science engineering trial software / shareware for linux

Red Hat Enterprise Linux v.4, released in February 2005, provides significant technology enhancements over the v.3 release. Areas of specific development include improvements in security capabilities, increased server performance and scalability, and enhanced desktop capabilities?all while ensuring a high level of compatibility with prior releases.
Red Hat Enterprise Linux supports a wide range hardware and software applications, and is the worlds leading enterprise-focused Linux environment.
The following section outlines a few of the major new features in Red Hat Enterprise Linux v.4:
Linux 2.6 kernel infrastructure
Red Hat Enterprise Linux v.4 provides the most stable and robust commercial product based on the Linux communitys 2.6.9 kernel. Open source projects such as Fedora provided an environment for the Linux 2.6 kernel to mature significantly during 2004.
As a result, the Red Hat Enterprise Linux v.4 kernel offers numerous improvements over earlier kernels, including many enhanced algorithms and features:
- Generic logical CPU scheduler: Handles multi-core and hyperthreaded CPUs.
- Object-based Reverse Mapping VM: Improved performance in memory constrained systems.
- Read Copy Update: SMP algorithm optimization for operating system data structures.
- Multiple I/O schedulers: Selectable based on the application environment.
- Enhanced SMP & NUMA support: Improved performance and scalability for large servers.
- Network interrupt mitigation (NAPI): Improved performance for heavy network loads.
Improved storage and file system capabilities
Numerous enhancements have been incorporated into Red Hat Enterprise Linux v.4 that improve the scalability and performance of the data storage subsystems, including:
- Ext3 performance: Block Reservations and Hash Tree Directories improve the performance of read/write I/O and directory scanning operations.
- Ext3 scalability: Dynamic file system expansion and file system sizes up to 8TB are now supported.
- Logical Volume Management: A comprehensive update to the LVM provides new features such as read/write snapshots and transactional metadata updates, along with a flexible new management GUI. Mirroring and enhanced multipathing are scheduled for delivery by mid 2005.
- Scalability: Enhanced storage LUN management makes it possible to configure much larger storage subsystems.
- Automounting: The inclusion of AutoFSv4 provides sophisticated device access control, supporting features such as browsable mounts and replicated servers.
- Cost reduction: Support for Serial ATA disk storage provides increased performance, higher densities, and reduced cost per megabyte over traditional IDE devices.
New security capabilities
Provision of sophisticated security capabilities has been a specific development focus of the Red Hat Enterprise Linux v.4 release. New features:
- Mandatory Access Control: Security Enhanced Linux (SELinux) provides a MAC infrastructure that complements the existing Discretionary Access Control security features provided by the standard Linux environment. In a MAC-based environment, application capabilities and privileges are set by predefined policies and enforced by the kernel. This prevents errant applications from compromising system security.
- Memory management enhancements: Several features, including Exec Shield and Position Independent Executables, combine to prevent applications from being exploited by attacks such as buffer overflows.
- Compile and runtime consistency checking: New buffer validation techniques in the GCC compiler and Glibc library greatly reduce the risk of faulty applications being compromised.
Improved desktop capabilities
Significant emphasis has been placed on providing a feature-rich, easy-to-use, desktop environment for all Red Hat Enterprise Linux family members (including Red Hat Desktop). A brief summary of new features:
- Personal productivity: Advanced user capabilities are provided by the OpenOffice.org productivity suite, the Firefox web browser and Evolution email client
- Plug-and-play device support: Easy handling of devices such as USB disks and digital cameras (as well as photo management applications such as gThumb)
- Multimedia: Applications for audio, video, and streaming content such as RhythmBox, HelixPlayer, Totem, and SoundJuicer
- User environment: GNOME 2.8 provides numerous enhancements for a more consistent graphical look and feel. Comprehensive management tools (e.g. printer and network management and VNC-based application session sharing) and utilities (e.g. Gaim instant messaging, and GIMP image processing) combine to provide a complete and highly functional user experience.
- Interoperability: Technologies that allow user login authentication with Microsoft Active Directory, NTLM authentication for web-based applications, Evolution mail client access to Windows Exchange Servers
- IIIMF: The Internet/Intranet Input Method framework provides the next-generation multilingual Unicode input method framework. It offers many features, such as full Unicode support and the ability to run multiple concurrent language engines.
Miscellaneous features
As a major new release, almost every aspect of Red Hat Enterprise Linux has been enhanced. Some of the more important improvements:
- Compatibility with prior releases: Red Hat Enterprise Linux v.4 includes compatibility libraries that enable most v.3 and v.2.1 applications to continue to run without modification.
- Languages: Focused on international standards, such as OpenI18N and GB18030, Red Hat Enterprise Linux has documentation and software available in 15 languages: English, Japanese, German, Brazilian Portuguese, Korean, Italian, French, Simplified Chinese, Traditional Chinese, Spanish, Devnagari, Bangla, Punjabi, Tamil, Gujarati.
- Auditing: In an update planned for mid-2005, a new auditing facility will be available that provides an open, bidirectional socket interface that can be used by auditing applications. It provides comprehensive auditing capabilities for SELinux and standard Linux events.
- File serving: Provision of NFSv4 provides features such improved security, operation coalescing and integrated file locking, while Samba provides easy access to Microsoft Windows printers and file shares.
- Software development: The latest GCC 3.4 compiler toolchain, and a technology preview of the forthcoming GCC 4.0 toolchain, are provided. These offer standards-compliant C/C++ and Fortran 95 development environments.
- Advanced configuration and power interface: Support for the ACPI standard enables a wide range of power management capabilities (battery monitoring, automated power down, suspend), and provides a foundation for increasingly sophisticated features in the future.
- Extras: Optional software is provided on the Red Hat Enterprise Linux Extras CD and Red Hat Network channel. This includes features such as additional desktop applications (e.g. Adobe Reader, Macromedia Flash), Java environments, and printroom-quality Agfa/Monotype fonts.
Main features:
Server features summary
- Databases - Leading open source databases: PostgreSQL, MySQL
- Development - Environments for C, C++, Java, Fortran with Perl, Python, CVS and Emacs
- Engineering - Computational tools including blas, pvm, and lam
- File servers - FTP, NFS, and Samba (CIFS)
- Mail server - IMAP/POP servers with Cyrus, Sendmail, spamassassin
- Networking - Complete suite of network servers and firewall
- Printing - CUPS/lpr printing systems
- Security - Extensive features including SSL, IpSec, MAC/DAC
- Web server - Apache server with numerous mod/php plugins
Client features summary
- Document preparation - OpenOffice.org office suite 1
- Extensive Microsoft interoperability
- Laptop power management - APM/ACPI
- Mail - several clients including Evolution
- Multimedia support - applications for multiple audio/video formats
- Plug-and-play device support
- RDP terminal services
- Remote desktop sharing/collaboration
- User interface - GNOME-based with optional KDE
- Web browsing - Firefox
- Wireless support
- X Windows system

Return To Castle Wolfenstein is the awesome follow-up to the original Wolfenstein 3D.

This is the follow-up to the old Wolfenstein 3D game, and it does not disappoint. Gorgeous graphics, wonderful sound, and awesome gameplay. Killing Nazis is fun!!! When youve finished the single player missions, go online and check out the rich multiplayer options.

You are B.J. Blazkowicz, [You are B.J. Blazkowicz, a highly decorated Army Ranger recruited into the Office of Secret Actions (OSA) tasked with escaping and then returning to Castle Wolfenstein in an attempt to thwart Heinrich Himmlers occult and genetic experiments.

Himmler believes himself to be a reincarnation of a 10th century dark prince, Henry the Fowler, also known as Heinrich. Through genetic engineering and the harnessing of occult powers, Himmler hopes to raise an unstoppable army to level the Allies once and for all.

There are playable single- and multi-player demos at the download site.

Cedega, TransGamings flagship Linux portability product, allows hundreds of Windows games to run on Linux seamlessly and transparently, right out of the box. With Cedega installed on a computer running Linux, users can simply insert their favorite Windows game CD, then install and play that game just as they would on a Windows system. Cedega can run hundreds of top tier titles on Linux, including blockbuster hits such as BattleField 2, Dungeon Siege 2, Madden 2006, Half Life 2, World of WarCraft, City of Villains, WarCraft III and Star Wars Galaxies, just to name a few.
How Cedega Works
Cedega works by directly loading a Windows program into memory on a Linux system and linking it to a Linux-optimized version of the Win32 APIs. TransGamings Cedega implements common multimedia Windows APIs such as Direct3D, DirectInput, DirectSound and many others by mapping them to Linux equivalents like OpenGL, X11, and the OSS or ALSA sound APIs. Cedega is the culmination of many years of effort on these APIs. The TransGaming Teams knowledge of APIs such as DirectX is probably second only to Microsofts.
The Cedega Experience
Cedega also provides an easy to use interface to manage the games installed on a Linux system, as well as the options that can be selected for each title. Unlike how games are installed on a Windows system, Cedega installs each game into its own separate environment, thereby ensuring that the new game can never interfere with previously installed titles. Removing a game is just as easy - instead of a complex and error prone uninstall process, the game environment can simply be deleted without affecting other installed games.
Also unlike Windows, Cedega allows the user to specify that a game should run in its own Window, instead of taking over the whole screen. Want to keep a window open on your favorite massively multiplayer game while you search the web? With Cedega, doing so is just a click away!
Getting Cedega
Cedega is available on a subscription basis through TransGamings website. Subscribers get access to the latest Cedega releases including regular hotfixes and updates, access to both email and web-based support from TransGamings professional staff, posting access to TransGamings user forum, and the right to vote on what TransGamings Cedega team should work on for future releases.
TransGaming pioneered the concept of customers having a direct and regular influence on our development work through a regular monthly vote. Each month, TransGaming subscribers are asked to vote on development topics raised for discussion on our website.
TransGamings staff uses the results of this polling to choose the most important games and technologies that we should work on for the following month, and provides a development status update detailing the engineering work that took place the previous month.
Click here to subscribe and get immediate access to Cedega, and tell us what games you want to see working next on Linux!
Version restrictions:
- 14 days limited DEMO

The critically acclaimed blockbuster strategy-simulation hit "Railroad Tycoon II" along with "Railroad Tycoon II: The Second Century Expansion Pack" from developer PopTop Software and publisher Gathering of Developers is now available for Linux!

These real-time strategy simulation games place gamers in a world of big business, expansionism and engineering in which all aspects of the railroad industry can be controlled. Named Strategy Game of the Year by Computer Games Strategy Plus and Imagine Games Network, Railroad Tycoon II captures the authentic look and feel of the fabled late-1800s railways and focuses on industries such as coal, steel and textiles.

Railroad Tycoon II has over 34 types of cargo and 50 train engines, and also features sophisticated economic system and simulated stock market. Railroad Tycoon II: The Second Century focuses on the post-industrial years of the 1930s through 2030.

In The Second Century, gamers encounter world catastrophes such as World War II, the Cold war and global warming, and must solve modern problems such as the increasing demand for mass transportation in major cities.

Railroad Tycoon II is the first game developed exclusively for 1024 x 768 resolution computer screens in either 16-bit or 8-bit color. It supports multi-play over LAN and the Internet.

Visual Paradigm for UML is a powerful, easy-to-use UML modelling and CASE tool. Visual Paradigm for UML Modeler Edition lets you draw all types of UML diagrams, reverse source code to UML models, generate source code from UML diagrams, and much more.
It features the latest UML support (use case diagrams, class diagrams, component diagrams, etc.), incremental round-trip engineering, instant reverse for Java, C++, Dot NET exe/dll, XML, XML Schema, and CORBA IDL, Rational Rose support, Microsoft Visio integration, and report and HTML/PDF documentation generators.
Enhancements:
- Reverse engineering of ERD from DDL was introduced. ERD models like entities, views, and relationships can be generated by reversing the data definition language.
- Images can be incorporated into documentation.
- Documentation structure can be saved as a template for reuse in other models.
- Hibernate annotations are supported in ORM persistence.
- Hibernate version tags can be generated for optimistic concurrency control.
- Ada95 and Flash ActionScript 3.0 code can be generated through the Instant generator.

DB Visual ARCHITECT (DB-VA) offers software developers an excellent solution for database applications development. DB Visual ARCHITECT is an Object-Relational Mapping tool which provides an easy-to-use environment bridging between object model, data model and relational database.
DB-VA not only empowers you the visual modeling capability for performing both logical and physical data design, but also automates the roundtrip mapping between object model and data model.
Developers save enormous amounts of time using DB-VA to manage the coding of SQL and JDBC transparently with Plain Old Java Objects (POJO), as DB Visual ARCHITECT empowers software designers to perform roundtrip engineering of a relational database into a Class Diagram, and to an Entity Relationship Diagram and vise versa. Likewise designers can also create a database from entity relational models or class models visually on the fly.
DB-VA also generates a cost-effective, reliable, scalable and high-performance object to relational mapping layer. The generated mapping layer includes the support of transaction, cache and other optimized features. DB-VA increases the productivity and significantly reduces the risks of developing the relational mapping layer manually.
Main features:
Automate the Mapping Between Java Objects to RDBMS Tables
DB Visual ARCHITECT helps mapping between Java objects to relational database. This act not only preserves the data, but also the state, foreign/primary key mapping, difference in data type and business logic. Developers are no longer necessary to handle those tedious tasks.
Re-engineering Application Based on Legacy Database
DB Visual ARCHITECT allows you to reverse database (DB Reverse) tables through JDBC into UML models. You can form Class Diagram from the reversed models and redesign the legacy database without pain.
Multiple Database Support
DB Visual ARCHITECT promote easy migration between databases by enabling the same set of ORM Java objects to serve different databases. Besides, the tool help transforming proprietary data-type into one that suit the default database which is specified by user.
Well Proven Visual Modeling Technology
DB Visual ARCHITECT inherits the visual modeling environment from Visual Paradigm for UML, a well-known UML CASE Tool that provides intuitive inline editing for both Class Diagram and ERD. This truly what-you-see-is-what-you-get diagram editing facility reduces the effort and time in design the system.
Enhancements:
- A branch and tag capability was introduced to the VP Teamwork Server, Subversion, and CVS repository integration.
- With advanced branch and tag support, different modeling projects can run in parallel while keeping the release quality project stable in the trunk.
- There are also a number of enhancements for various other features.

Savage is a masive multiplayer online RPG game.

In a primal and violent time eons from now, nomadic humans roamed the earth in a never ending struggle to survive. The beasts and creatures suffered mightily at the cruel hand of man as the land was stripped clean by human scavengers and natural resources were consumed with abandon. It was a time of hunger, disease, and death for mankind as science and other knowledge remained untapped ancient secrets. Humanity was fragmented into isolated tribes led by vicious and petty war chiefs.

This was also a time of evolution and growth for the creatures of the world. They developed an intelligence equal to that of humankind and formed communities and packs in a new social order. Continuously subjected to humanitys cruelties and deprivations, a deep-seated hatred of humanity was forever instilled within them.

Life on our planet, now known as Newerth (New Earth), became a daily struggle between man and beast for the basic natural resources that nurtured life for them both. Ongoing skirmishes over food, precious metals and even simple building blocks of stone escalated to the point that both sides became threatened with extinction. Humanitys isolated tribes, at times united under various war chiefs, remained so fragmented that their very existence was in question. The beasts and creatures also failed to unite in a common cause and continued to fight for their lives individually.

Out of this chaos arose a warrior of unmatched ability and leadership. His name was Jaraziah Grimm, son of the legendary brutal warlord, Harrin Grimm. Following the mysterious disappearance of his father, Jaraziah boldly reorganized the remaining nomadic tribes under a single banner called the Legion of Man. He created the Protocols of Grimm, laws which proclaimed man superior to the beasts and creatures of the world. He excelled in his new role as a leader and human commander. Under his banner and the Protocols of Grimm, he created a revolution of thought as well as military power. Through his influence, the human clans embraced common goals, such as the development of scientific knowledge and rekindling the lost art of warfare to regain their rightful place of dominance in Newerth.

During this time, the Legion of Man discovered ancient secrets of science and war and quickly applied them to engineering weapons of warfare. Long forgotten knowledge of chemistry, electricity and magnetism resurfaced and ushered in a whole new understanding of science. Jaraziahs leadership, coupled with scientific advances, began an era of unprecedented success for the Legion of Man against the beast race. Victory followed victory as the Legions influence was expanded dramatically. The Legion of Mans future as the dominant power on Newerth seemed assured.

Jaraziahs youngest sister, Ophelia, was a mere child during the renaissance of the Legion of Man. Even at an early age, she was unlike any legionnaire. Ophelia found peace in the outdoors amongst the untamed creatures of the wilderness. She discovered that she had a special gift with animals, an ability to communicate with even the most vicious of beasts. She was at first shocked at her special talent but soon enough learned to use it. Flower buds opened at her touch; even the most powerful beast was calmed by her presence and beasts would howl when she waved goodbye to them.

Her gift was clearly supernatural and she successfully hid it from her brother and the rest of the Legion of Man. However, she felt very strongly about the open conflict between man and the beasts. Even as a young child, she openly debated with Jaraziah time and again about her belief that beasts and man could and should live together. Through tiring and seemingly endless confrontations, brother and sister grew further and further apart. Eventually Ophelia was ostracized from the Legion. She was secluded in her parents home, hidden away as an embarrassment to the Legion and Jaraziah, living as a prisoner.

Then one night, under a star-framed moon, a tiny beast creature wandered into the middle of the settlement. Not knowing the risk it was taking, the young pup was there to return a flower that had fallen from Ophelias hair the day before when she was in the forest. A Legionnaire spotted the young beast and an alarm was raised. To her horror, the cowering, harmless creature was cornered and brutally slaughtered. Ophelia, gripped with the true horror of what her life had become, was unable to remove the memory of that night and the years of beast bloodshed from her mind. Her hatred for what had become of her people and her brother corrupted her soul. Like her father before her, she lost track of what is good in humanity.

Nightmare and reality blurred; the days turned to nights until her torment finally ended. In a waking dream, she determined that it was time for her to escape from the Legion of Man. She spoke to the song birds outside her window and with their help and with the help of nearby creatures; she did indeed escape into the wilderness. She completely disappeared from the Legion of Man.

Ten years passed. The renaissance of the Legion continued unabated. However, new and disturbing reports from the borderlands began to come in. They said that the beasts of the world were reuniting against the humans. A new horde of creatures was organizing under a mysterious and powerful leader. Some of the creatures were similar to the ones that they had fought and killed before, yet new and strange, and seemingly more intelligent and far more deadly than in the past. This new Beast Race had learned the ways of human warfare and was making a formidable new army.

Reports further came in that the beasts were developing their own form of science that was unlike anything ever seen before, which human scholars could only describe in the old tongue as "magic". Now the Beast Horde had crossed the human borders and was raiding and annihilating isolated settlements. There had been sightings of a human woman, proclaimed as the Beast Queen, leading the new armys successes.

A waning moon heralded change and Jaraziah realized that a new savage age is dawning. It became clear under a blood red sky that the renaissance of the Legion of Man had ended and the days of uncontested human domination of the world were over.