Here is a list of open source projects you might want to check out. They are free and contain no adware, spyware or other bad things.
|OpenOffice.org||OpenOffice is the free alternative to MS Office.|
|FireFox||Switch from Internet Explorer to the FireFox browser in seconds and never turn back. Say goodbye to pop-up's and automatic spyware/addware installation.|
|Mozilla||Mozilla features besides FireFox also the ThunderBird e-mail client and the SunBird calendar program.|
|SourceForge||SourceForge has over 80.000 open source projects. Many of them are crap or not ready for production, but some are really usefull. This project is also hosted by SourceForge.|
|Linux||Linux is the free alternative to Windows. There are several major distributions of it, such as RedHat, Debian and Suse. Most open source projects run even better on Linux.|
|Apache||Apache features mainly server-side projects, such a web and mail servers, ...|
The open source definition is defined by the Open Source Initiative (OSI).