Free in production software for linux

Roster-in-a-Box project is a course management system designed to facilitate the use of autograded homework assignments, while also allowing for text-based questions to be submitted online and graded online by the instructor. I developed and currently use the system for my introductory statistics and microeconomics courses at Long Island University, and I have had it in production since 2005. While you will be able to break the program if you try hard enough, it is stable and very much ready for use.
I wrote the program because I wanted something simpler than Moodle (and also because my school was not supporting Moodle at the time that I started the project). I love Moodle, and Moodle may be right for you, but it wasnt right for me, because I didnt want the course management system to take over my course web site. Basically, Roster-in-a-Box handles the homework and grading functions with a couple of web pages and leaves you on your own to design the rest of your course web site. That may or may not be what you want.
It should be quite simple to take my statistics modules (and the forthcoming microeconomics modules that I just havent gotten around to packaging) and get your own introductory statistics course up in no time. It is also quite simple to set up a course that consists of only text-based, manually-graded questions. On the other hand, if you want to write auto-graded assignments for some other purpose, you will have to know how to code them yourself. The structure of the modules should be somewhat self-explanatory to experienced programmers, but is probably daunting to those who do not know how to code. The entire program is written in PHP, and uses MySQL as a back-end database.
Version restrictions:
- There are things you could do while editing the assignment list that would leave it in an inconsistent state. For example, if you leave a page open, then open up a different page and make edits in that page, and then go back to the first page and save your changes, you may screw things up. I will get around to fixing this problem at some point, but in the mean time try not to do things like that.
- The program uses the PHP session variable, which by default times out after 24 minutes (supposedly due to security concerns). You should bug the web site administrator to lengthen the PHP system setting session.gc_maxlifetime to be as long as possible.
- By default, the system resets to the Spring semester on January 1st, the Summmer semester on May 15th, and the Fall semester on September 1st. I should probably make these dates editable somewhere in site_settings.php, but instead youll have to dig through administer.php and homework.php if you want to change them.
Enhancements:
- This has been used in a production environment for two years now, but the code has never been released.

Firebird .NET Data Provider is an ADO.NET data provider for Firebird. Firebird .NET Data Provider is written in C# and provides a high-performance native implementation of the Firebird API. It also includes an implementation of the Firebird Services API and Firebird array datatype support.

Firebird is a relational database offering many ANSI SQL standard features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used in production systems, under a variety of names since 1981.

Firebird is a commercially independent project of C and C++ programmers, technical advisors and supporters developing and enhancing a multi-platform relational database management system based on the source code released by Inprise Corp (now known as Borland Software Corp) on 25 July, 2000 under the InterBase Public License v.1.0

RtspProxy is a proxy server for multimedia streaming services based on the RTSP protocol.
The current version is a complete rewrite from scratch in Java of previous versions based on C++. The goal is to build a robust and scalable system usable in production environment.
The proxy is based on an asynchronous network framework, Apache MINA , which is built on Java NIO. This framework does permit to RtspProxy to handle high loads and concurrent users.
RTSP Caching Proxy is a proxy server that works with the RTSP protocol in multimedia streaming reproduction. RTSP (Real Time Streaming Protocol) is an emerging protocol for "session initiation" scopes, its purpose is to establish the conditions of an audio-video streaming session. The streaming data is then sent over other channels using other protocol such as RTP (Real Time Protocol).
Using a RTSP proxy does permits to access multimedia content without the need of being directly connected to the internet, for example being behind a corporate firewall.
Enhancements:
- A preliminary implementation of the IP address and host name filter was added.
- The Windows startup script was fixed.
- Session data is properly cleared when a session is closed.
- Only a UDP port pair is used for all RTP/RTCP packet handling and sending for all the connected clients.

J2ME ChartComponent is an MIDP 2.0 charting component with basic functionality for showing charts on embedded devices.
It currently implements the following charts:
Line
Horizontal bars
Vertical bars
Though basic and far from being complete, its being already used for simple charts in production environments.
J2ME ChartComponent currently implements horizontal bar, vertical bar, and line charts. An incomplete and experimental pie chart component is implemented, as well as a very simple legenda.
Enhancements:
- With this release, it is possible to show values for pie charts.
- The drawing functions have been moved outside of the paint method, so that it is possible to draw directly on Image objects instead of having the chart items shown on the Screen (see the drawPie and drawChart methods).
- Some minor bugs have been fixed.

Wizard Site Framework project has been used in production sites for three years, serving countless thousands of page views.
It is modular , coming out of the factory with a basic structure, allowing the webmaster to spend more time on design and less on the plumbing.
Included is a user authentication system, scripts for registering, changing passwords, contact forms, confirmation emails, listing users, editing their profiles, privacy statements (etc.etc.), fully integrated into the site skeleton and under the rule of common CSS stylesheets.
Very cool is the menu and sitemap systems which are generated from the database automatically when a page is added or altered during authoring. The menu systems use the famed Suckerfish CSS-driven Javascript code harnessed to a MySQL database with PHP scripting.
You can, for example, have either horizontal or vertical menus, and they can be set at whatever depth you think is reasonable. You can hide pages from the menu or sitemap or restrict their view to only site members with the appropriate credentials.
Other features include such utilities as visitors statistics tied to the user management system so that you can see what specific pages on your site your registered members are viewing.
This is the third generation of the Wizard framework. While the structure of the site continues to be managed through an admin panel, and stored in a MySQL database, what is rather unique about the latest iteration is that the page content, indeed the entire page, is stored on the server as an HTML - PHP file.
While previous versions stored HTML content in the database, the Version 3.0 makes the page completely accessible to such online programs as Macromedia Contribute or other authoring tools.
Unlike previous versions, or content management systems (CMS) that store the HTML content in a database table, you have the ability to include whatever server-side or client-side code in site pages, removing a major disadvantage of most content management systems.
This makes Wizard Site Framework totally customizable and flexible. And because it is lightweight and very efficient it is easily scalable to large sites.
Enhancements:
- Many major and minor bugs were fixed.
- The front and back ends are now W3C compliant.
- A Poll and Blog script was added.
- Preliminary support for the PostgreSQL database was added.

Hpodder is a tool to scan and download podcasts. Such tools are often called podcatchers.
Hpodder is a command-line tool for Linux. The project has quite a few features. A few highlights are that it is easy to learn and use, has automatic discovery of feed metadata, and can import iPodder settings.
Enhancements:
- This is the first production release.
- Feeds or episodes that repeatedly return errors are now automatically pruned.
- Cleaning of download areas was improved.
- Bugs were fixed.

GNUstep is a cross-platform, object-oriented framework for desktop application development.

Based on the OpenStep specification originally created by NeXT (now Apple), GNUstep enables developers to rapidly build sophisticated software by employing a large library of reusable software components.

GNUstep is used in production environments at several organizations...

...an object-oriented tool development kit

The first two packages (GNUstep-make and GNUstep-base) that make up the core libraries contain a complete system for writing non-graphic tools in Objective-C. The make package allows you to setup a simple and powerful system for building, installing and packaging your tools. The base package includes all the classes necessary for writing an incredible array of tools, from wrappers for system tools to tools for communicating with web and other types of servers.

...a graphical development kit

The core libraries contain classes for developing a complete graphical application for almost any purpose. Along with our object-oriented, graphical development applications, ProjectCenter and Gorm its simple to write very complex commercial applications in weeks or months, rather than years (or often, never) in the case of other development environments.

...a desktop

Many GNUstep applications have been written to provide a powerful user experience for working on your computer. These include our workspace manager, GWorkspace, and mail client, GNUMail. GNUstep does NOT have a window manager. You can use any window manager you want, although we recommend that you use WindowMaker for a better experience (The WindowMaker project is not associated with GNUstep). Many other applications that are useful for a desktop are not contained on this web site, nor are the controlled by the GNUstep project - there are too many ideas about what a descktop should look like that we have not made up our minds about which one to endose yet. Here are some current ones:

- Project Backbone
- Etoile