Free platform emulator software for linux

Wide Area Link Emulator enables you to set and test various parameters of a WAN access link (also known as a bottleneck link) before testing on a fully-functional network.

Any ISP has a high bandwidth LAN (of the order of tens of Mbps, e.g. Ethernet) and a WAN access link with relatively low speeds (of the order of a few Kbps to a few Mbps). To be able to evaluate the ISPs performance, actual tests will have to be conducted on a live, fully functional network. This would imply enabling certain features in communication equipment which could be detrimental to the proper functioning of a commissioned network. To address such a problem of being able to characterize/quantify the network operation in terms of its performance with respect to various parameters, a test-bed emulating the ISPs connectivity to the Internet would be an ideal solution.

An important factor in setting up such a test-bed, is emulating the WAN Access Link. Using complex hardware is costly. Such a link can however be easily implemented by emulating the scenario on popular physical technology such as Ethernet. By changing the TCP/IP stack on a Personal Computer, the rate at which packets are injected into the network can be controlled and other necessary features can easily be added.

WALE was implemented in 2 phases and the first version can emulated bandwidths up to 8Mbps and uses FIFO queues with drop-tail.

WALE v2 can emulate bandwidths of up to 80Mbps(a 10-fold improvement over version 1) due to the stripped down version of Micro-second resolution timer being used in the Linux kernel. WALE also implements differentiated services are recommended by IETF. A hash-based packet classifier is used to classify packets into one of 3 queues (Expedited Forwarding, Assured Forwarding and Best Effort). A simple priority scheduling has been implemented between the queues.

Version 2 has been implemented in the Generic Device Layer of the Linux Kernel. The kernel version is 2.2.19. WALE2 kernel patch can be downloaded here. An ncurses based front end has been implemented for setting and viewing various parameters of the bottleneck link.

Platform Independent Petri Net Editor project (PIPE) creates and analyses Petri Nets quickly, efficiently, and effectively.

A key design feature is the modular approach adopted for analysis, enabling new modules to be written easily and powerfully, using built-in data layer methods for standard calculations.

Six analysis modules are provided, including Invariant Analysis, State-Space Analysis (deadlock, etc.), and Simulation Analysis and Classification.

PIPE adheres to the XML Petri net standard (PNML). The file format for saving and loading Petri Nets is extensible through the use of XSLT, the default being PNML.

SIMD Cross-platform headers is a cross- platform, cross-compiler, cross CPU C/C++ header collection that aids the creation portable vectorized (SIMD) C/C++ code.
SIMD Cross-platform headerst supports (or partially supports) x86 (MMX/SSE/SSE2) GCC and MSVC, PPC Altivec GCC and CodeWarrior, ARM GCC, and software-emulated SIMD.
NOTE: Code must be 16-byte aligned. Align to 16 when allocating memory.
X86/XSCALE (Intel) vs. PowerPC/MIPS
While the PowerPC and MIPS SIMD instructions take 2 source vectors and a destination vector, the Intel platforms only take a source and destination. Example:
PPC/MIPS can do:
C = A + B
X86 can only do:
A = A + B (or A+=B)
Code written either way will work on the X86, and still be faster than 387 math, but preserving the registers takes significant overhead (Disassemble the test program for an example. The prints preserve, the disassembly test does not.) For the fastest code between systems, write your SIMD math as the X86 expects, manually preserving SIMD variables.
At least GCC for PPC doesnt seem to have any issues figuring out how to deal with a source and destination memory address being the same.
Enhancements:
- Created file with some i386, GCC dialect

BlogTrader Platform is a free, open source stock technical analysis platform with a pluggable architecture that is ideal for extensions such as indicators and charts. BlogTrader Platform is built on pure java.
It supports parallel quote data retrieval from Yahoo! or ASCII text files, historical, intra-day, and real-time charts, and candle, bar, and line charts. It has a natural date/trading date view model. "MACD", "OBV", "ROC", "KD", "BIAS", "DMI", "RSI", "MTM", and "WMS" indicators and drawing of "Line", "Parallel", "Gann Angle", and "Fibonacci Line" are supported. You can easily write your own indicators.
Main features:
- Retrieve quote data in parallel from Yahoo! Finance, netfonds.se, or CSV files.
- Save quote data to local database (hsqldb).
- Adjust quote chart for splits and dividents if possibale (Yahoo! quote data only).
- Daily, Weekly, Monthly charts (Weekly, Monthly data are composed automatically from Daily data)
- Historical/Intra-Day/Real-Time Chart
- Real-time Ticker Board
- Update Daily, Weekly, Monthly Charts and their indicators automatically according to the newest tickers.
- Multiple quote-charts comparison
- Candle/Bar/Line
- Calendar/Trading date view
- Define indicators parameters separately for Daily, Weekly and Monthly charts, parameters can be saved as default or apply to all
- Add layer drawings separately for Daily, Weekly and Monthly. Save/Restore drawings.
- Carefully design for writing your own indicator easy, but in java (maybe will support scripts some day)
- Supports multiple platforms, includes windows, linux, macos, solaris, etc. (Java JRE 1.5 required)
- More to be come ...
Enhancements:
- Minor bugfixes

NewsCloud Media Platform project is a LAMP-based social network community site for news aggregation and citizen journalism. The system integrates Smarty for template customization.
The NewsCloud Media Platform allows bloggers, developers, communities and organizations to integrate news gathering and discussions between their own Web sites and the NewsCloud community. The NewsCloud Media Platform is open source and can also be used to launch independent news-based community Web sites.
The NewsCloud Wiki will help you get more involved in using the NewsCloud Media Platform.
Guides for Bloggers and Groups
NewsCloud makes it easy for bloggers to share their work with our community and improve the news gathering elements of your own site. If you are a blogger interested in using NewsCloud to enhance and promote your blog, youll want to read our Guide for Bloggers. Our Guide for Groups is coming soon.
Guide for Developers
Whether you are interested in using our NewsCloud Web Services API to enhance your own Web site or want to get involved in using or extending the code behind NewsCloud, youll want to learn more about the NewsCloud Media Platform. Please visit our Guide for Developers for more information.
We also have set up a Google Groups Developer Forum for discussions and peer support.
Guide to Templates
NewsCloud provides a powerful templating system for customizing your journal, your groups and soon your own news site. If you are interested in designing the look and feel of your NewsCloud pages to brand your organization, non-profit, blog or Web site, please visit our Guide to Templates
Enhancements:
- We made some slight changes to make installation easier.
- We have a complete Debian install script on our Wiki now.

Eclipse Web Tools Platform Project is a top-level Eclipse project that contains tools for developing Java Web applications.
The WTP project includes the following tools: source editors for HTML, Javascript, CSS, JSP, SQL, XML, DTD, XSD, and WSDL; graphical editors for XSD and WSDL; J2EE project natures, builders, and models and a J2EE navigator; a Web service wizard and explorer, and WS-I Test Tools; and database access and query tools and models.
Main features:
- Extension of the Eclipse value proposition The Eclipse Project has set a high standard for technical excellence, functional innovation and overall extensibility within the Java IDE domain. We intend to apply these same standards to the Web/J2EE application-tooling domain.
- Vendor ecosystem A major goal of this project is to support a vital application development tools market. Its exemplary functionality will be useful on its own but it will be designed from the start to be extensible so commercial vendors can use what this project delivers as a foundation for their own product innovation and development efficiency.
- Vendor neutrality Vendor neutrality will be at the core of this project. We aim to encourage Eclipse participation and drive Eclipse market acceptance by strengthening the long-term product value propositions of the widest possible range of application development vendors.
- Standards-based innovation This project will deliver an extensible, standards-based tooling foundation on which the widest possible range of vendors can create value-added development products for their customers and end-users. Where standards exist, we will adhere to them. At least, at first, where standards are emerging, we will wait for them to emerge; this can be re-evaluated later according to user needs and contributor availability. Where multiple technologies are widely used for a given functional need, we will attempt to support each, subject only to technical feasibility and our goal of providing the most capable and extensible foundation long term.
- Agile development Our aim is to incorporate into our planning process the innovations that arise once a project is underway, and the feedback from our user community on our achievements to date. We think an agile development and planning process, in which progress is incremental, near-term deliverables are focused, and long-term planning is flexible, will be the best way to achieve this.
- Inclusiveness & diversity We aim to assimilate the best ideas from the largest number of participants representing the needs of the widest range of end-users. So we will encourage organizations across a broad range of technical, market and geographical domains to participate in this project.