Completion is a unique productivity application which allows tasks to be assigned to projects and grouped by categories. You can also assocaite notes containing text, graphics and links to each project. In particular, Completion is well suited for use as part of a Trusted System as described in David Allen's book Getting Things Done: The Art of Stress-Free Productivity.
Completion requires Mac OS X 10.4 or greater and is currently under development. If you are interested in becoming a beta tester, please contact me at email@example.com.