Open-source software (OSS) is computer software that is available in source code form: the source code and certain other rights normally reserved for copyright holders are provided under a free software license that permits users to study, change, improve and at times also to distribute the software.

Open source software is very often developed in a public, collaborative manner. Open-source software is the most prominent example of open-source development and often compared to (technically defined) user-generated content or (legally defined) open content movements.
{Source : http://en.wikipedia.org}

Open Office Impress


IMPRESS is a truly outstanding tool for creating effective multimedia presentations. Your presentations will stand out with 2D and 3D clip art, special effects, animation, and high-impact drawing tools. 

You are free to use your old Microsoft PowerPoint presentations, or save your work in PowerPoint format for sending to people who are still locked into Microsoft products. Alternatively, use IMPRESS's built-in ability to create Flash (.swf) versions of your presentations.