Open source technology is a powerful tool for many disciplines and arenas.  It is usually presented free (meaning “without restriction”) as well as free of charge.  It is especially important to the field of assistive technology, as it expands the definition of accessibility to include economic factors.

• Ubuntu – A simple, attractive, powerful operating system
• OATS – Open Source Assistive Technology Software
• Xiph – Patent-free tools for audio and video, including Theora, Vorbis, ogg and FLAC