Linux and GTD
After searching the Web for weeks for a simple personal information manager, I stumbled upon Tomboy.
It's really a note taking software that allows you to link to other notes and can be easily used as a PIM or a contact manager. This is one of my favorite pieces of software.
If you are using Linux, Tomboy is worth a try. If you are using Debian: go to command line and type apt-get install tomboy and that should take care of it. Ubuntu users may have to enable the Universe repository and then type: sudo apt-get install tomboy.