Free can be used to software for linux

Database Functions is a PHP class that can be used to build and execute MySQL database queries.

It can build SELECT, INSERT, UPDATE and DELETE queries from lists of parameters and values.

The class can also execute the generated queries and retrieve the SELECT query results into associative arrays.

MaklerPlus is a Web based application for real estate business. It can be used to administrate real estates with an unlimited number of illustrations per object.

MaklerPlus includes a smart content management system.

EZ Red Skin Fix is a script-fu based on a technique by lylejk of dpreview.com that can be used to improve skin that has a reddish tint.

Image rotator can be used to automatically detect and rotate landscape/portrait photos from digital cameras.
Currently, only outdoor photos are recognized. Image rotator is a command line tool which uses an artifical neural network to detect the orientation of images. Image reading, scaling, and rotation are done with the ImageMagick library.
Enhancements:
- The --verify option can now be used to decrease the number of false decisions.
- This is done by running the image three times (original, rotated left, rotated right) through the neural network.
- A small memory leak was fixed.

Large Database Backup is a PHP class can be used to backup large MySQL databases into multiple files.

It can list the tables of a given MySQL database and generate SQL statements to create and insert records with the current values of the table rows, as if it was creating a new database. The class stores the generated SQL statements in files.

A full backup process can be split in multiple iterations to not exceed PHP default script execution time limit. Each iteration dumps a limited number of table rows. An iteration can be executed by a script that redirects the page request to itself at the end to proceed to the next iteration.

Poisson Media Recovery project can be used to retrieve slightly damaged files from CD-ROM media.

It sequentially mounts and umounts the device, and on each mount it tries to read as many new 512 byte sectors as possible.

I was able to use this tool to save some files from old CDs.

CCK Wizard is an addon that can be used to create an extension that customizes Firefox.
The CCK Wizard can be used to create an extension that customizes Firefox. To access it, after installation, select Tools->CCK Wizard.
Main features:
- Add identifer to the user agent string
- Change the default home page and startup override home page
- Change the title bar text
- Change the animated logo
- Change the web page and tooltip used for the animated logo
- Add a help menu item that links to a web page
- Provide sites for which popups and XPInstalls are allowed by default
- Preinstall browser plug-ins
- Preinstall search engines
- Add folders, bookmarks and live bookmarks to the personal toolbar
- Add folders, bookmarks and live bookmarks to the bookmarks folder
- Set default preferences
- Lock preferences
- Add registry keys (Windows only)
- Add certificates
- Set default proxy configurations
- Package other XPIs with your distribution
- Disable about:config

Stratagus is a free cross-platform real-time strategy gaming engine. Stratagus includes support for playing over the internet/LAN, or playing a computer opponent.

The engine is configurable and can be used to create games with a wide-range of features specific to your needs. See the data sets page for a list of current games using the stratagus engine.