Explicator is a planning tool to keep track of all your projects based on priority and dependancy.
It uses the basics of a network planning.

The application is written in Python with PyCharm (http://www.jetbrains.com/pycharm/)
Visualisation of the graph is done with XDot (http://code.google.com/p/jrfonseca/wiki/XDot)
User interface is made in PyGTK (http://www.pygtk.org/)
Uses sqlite3 to store data (http://www.sqlite.org/)