Free public computing software for linux

JikesTM is a compiler that translates JavaTM source files as defined in The Java Language Specification into the bytecoded instruction set and binary format defined in The Java Virtual Machine Specification.

You may wonder why the world needs another Java compiler, considering that Sun provides javac free with its SDK. Jikes has five advantages that make it a valuable contribution to the Java community:

* Open source. Jikes is OSI Certified Open Source Software. OSI Certified is a certification mark of the Open Source Initiative.
* Strictly Java compatible. Jikes strives to adhere to both The Java Language Specification and The Java Virtual Machine Specification as tightly as possible, and does not support subsets, supersets, or other variations of the language. The FAQ describes some of the side effects of this strict language conformance.
* High performance. Jikes is a high performance compiler, making it ideal for use with larger projects.
* Dependency analysis. Jikes performs a dependency analysis on your code that provides two very useful features: Incremental builds and makefile generation.
* Constructive Assistance. Jikes strives to help the programmer write better code in two key ways. Jikes has always strived to provide clear error and warning text to assist the programmer in understanding problems, and now with release 1.19 Jikes helps point out common programming mistakes as documented in Effective Java.

Abridged from a FAQ entry which was adapted from some material by Lou Grinzo for an article he wrote.

The fact that Jikes is a high-performance, highly compatible Java compiler that can be used on almost any computing platform makes it an interesting program and worth investigating for almost any Java programmer. But Jikes is also notable because it lies at the center of two events: the adoption of open source philosophy and practice by large corporations, and the continued growth of Java for Linux.

Its worth pointing out that Jikes is not, and is not intended to be, a complete development environment -- it is simply a command line compiler. It should not be considered a replacement for more complete tools, such as Source Navigator or IBMs VisualAge for Java which provide sophisticated graphical IDEs (Integrated Development Environments).

The Jikes compiler was released in binary form in April 1997 on the IBM alphaWorks site. Jikes for Linux was released on 15 July 1998. The response was overwhelming -- Jikes had more downloads in the three months after the announcement than in the fifteen months before the announcement.

Release of Jikes for Linux was soon followed by requests to open up the source. Many notes and comments from users suggested this would be a good idea. The source was released under a liberal license in December 1998 to make a very visible demonstration of IBMs commitment to open standards and to Java Technology, to make Jikes more reliable and accessible, to encourage more widespread use of Java Technology, to encourage standardization of Java Technology, and to gain some experience actually running an open source project. This marked the start of one of IBMs first efforts in the open source arena.

The original alphaWorks version of Jikes was written by Philippe Charles and Dave Shields of the IBM T. J. Watson Research Center. Since the release of the source they have continued to work on the compiler as contributors; however recently have officially been moved on to other projects within IBM. Today there are no IBMers who work on Jikes as part of their job description. Jikes survives today soley based on the free time contributions of members of the open source community.

The source code is available under IBMs Public License, which has been approved by the OSI (Open Source Initiative) as a fully certified open source license. The project provides access to the complete CVS development tree, which includes not only Jikes, but also the source for the Jacks Test Suite and the Jikes Parser Generator used to build Jikes. Jikes is included in many Open Source Operating Systems. The Jacks Test Suite is a replacement for the Jikestst package.

X/OS Linux is derived from the Free/Open Source rpm packages of Red Hat Enterprise Linux 4 (RHEL4) under the requirements set forth by their trademark policy.

X/OS has spent considerable effort to avoid using Red Hats trademarks in any way that would imply an association with or sponsorship by Red Hat.

After some delay, the final release of X/OS Linux 4.0 is now available to the public.

The X/OS Linux team has spent considerable effort to assure the label enterprise-grade Linux for this milestone release. With the simultaneous availability of X/OS Linux 4.0 for x86 and x86_64 processor architectures, it delivers the latest “best-of-breed” Free and Open Source software for both 32- and 64-bit platforms.

Highlights include the 2.6 Linux kernel featuring numerous enhancements over the previous 2.4 version, Security Enhanced Linux (SELinux) to apply more granular security policies, improved storage capabilities supporting file systems of up to 8TB and more.

The Global File System (GFS) and Cluster Suite software is included in this release to ease the task of creating and managing advanced cluster configurations, and is available as an extra option during installation. This powerful set of tools provides seamless scalability of applications such as databases, web servers and high-performance computing clusters — with GFS enabling nodes to simultaneously read and write to a single shared filesystem.

Next to providing an advanced server platform, X/OS Linux 4.0 adds various enhancements to the desktop — increasing usability with greatly improved office productivity tools, plug-and-play USB device recognition and power management supporting the ACPI standard.

In addition to compatibility with the de facto distribution for deploying Linux in the enterprise, X/OS Linux strides to include various other useful packages and tools that conform to the standard for mature and robust “enterprise-grade” software. One example is Xfce, an extra option in addition to Gnome and KDE, offering a light-weight desktop environment suited for use on low-end or thin client systems.

Minisip project is a SIP User Agent ("Internet telephone") developed at KTH currently running on Linux. Keywords: Secure VoIP; SIP; MIKEY; RTP; SRTP; SDP; Video Telephony; Push-to-talk. You can download it for free from the download page.

Minisip is developed by Ph.D and Master students at the Royal Institute of Technology, KTH, Stockholm, Sweden.

The source code is available as a number of libraries under the GNU Lesser General Public License (LGPL) and applications under the GNU General Public Licence (GPL).

ICHTHUX is a Christian Linux Distribution based on Debian GNU/Linux. We have chosen to develop ICHTHUX as a Custom Debian Distribution, so that we can benefit from the evolution of the core system of Debian while focusing on our goal : providing a Christian computing environment.

MOMHVis is a program for displaying nondominated solution of MOMH problems in 3D space using OpenGL.
Main features:
- pluginable architecture
- implemented MOKP (Multiple Objective Knapsack Problem) plugin
- enumeration of implemented MO algorithms by plugin
- on-line visualization of solutions during computing (you can set delay betwean solutions or stop during computing for most algorithms)
- solutions visualization computed with different MO algorithms on the same chart
- allows to show only selected objectives and solutions
- 2D view for two objectives (configureable)
- saving solutions to xml file and also loading from file
- advanced preferences for each algorithm (groups)
- multilanguage interface (english and polish)
- simple scripting editor (xml based)
- display some information about solution (OpenGL object picking)

libmsntp is a full-featured, compact, portable SNTP library. SNTP (RFC 2030) is a simplified version of NTP (RFC 1305), which allows precise synchronization of system clocks over a best-effort network.

libmsntp provides SNTP client and server functionality in a shared library with a simple API.

libmsntp is implemented as a thin layer on top of msntp, N.M. Maclarens command-line SNTP utility. msntp is compact, straightforward, and elegant, and Im indebted to Nick, and to the Cambridge High Performance Computing Facility, for providing the msntp source to the public.

Installation:

To install, type "make install". You may need to be the superuser. libmsntp installs into /usr/local by default; to install to a different location, edit the Makefile and change the PREFIX variable.

LDAPab is a Web-based address book for small companies. LDAPab features a public address book which is writable for all company staff and a personal address book for each staff member. LDAPab requires an existing LDAP server to authenticate users.