The Open Source Definition is used by the Open Source Initiative to determine whether or not a software license can be considered open source.


Open source doesn’t just mean access to the source code.
The distribution terms of open-source software must comply with the following criteria:

1. Free Redistribution

The license shall not restrict any party from selling or giving away the software as a component of an aggregate software distribution containing programs from several different sources. The license shall not require a royalty or other fee for such sale.

2. Source Code

The program must include source code, and must allow distribution in source code as well as compiled form. Where some form of a product is not distributed with source code, there must be a well-publicized means of obtaining the source code for no more than a reasonable reproduction cost preferably, downloading via the Internet without charge. The source code must be the preferred form in which a programmer would modify the program. Deliberately obfuscated source code is not allowed. Intermediate forms such as the output of a preprocessor or translator are not allowed.

Firestarter New!

GNU General Public License, Linux

Firestarter Ability to control both inbound and outbound connections. Provides a graphical interface for configuring firewall rules and settings. It also provides real-time monitoring of all network traffic for the system.


GNU General Public License, Cross-platform

GIMP Photo editing application that rivals Photoshop in features.

Paint.NET New!

Freeware, portions licensed under the MIT License, Microsoft Windows (XP, 2003, Vista)


Paint.NET Graphics editor with a very nice interface.

Inkscape New!

GNU General Public License, Linux, FreeBSD, Mac OS X, Microsoft Windows

Inkscape Vector graphics application.

More at


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