Inkscape : Inkscape is a professional vector graphics editor for Windows, Mac OS X and Linux. It's free and open source.
HttpWatch : An HTTP Viewer and HTTP Sniffer for IE and Firefox
Cachet : Beautiful & simple service statuses. The open source status page system, for everyone.
PHP unified diff patcher : A powerful class which allows to create and merge unified diff patches into any file. Fully written in PHP, uses the GNU standard unified diff format ...
OpenProject : OpenProject is a web-based project management system for location-independent team collaboration.
Project management and milestones
Project timelines...
Diffuse is a small and simple text merge tool written in Python. With Diffuse, you can easily merge, edit, and review changes to your code.