I work for a company called Marketocracy, and I started using David Allen’s Getting Things Done system about 4 months ago, and it really improved things for me. I was also using the Kinkless set of Applescripts to keep track of my to-dos, but I wanted it to be constantly in sync, I wanted it to integrate more readily with other programs, and I could never figure out how to get recurring tasks to work.

So I wrote my own program, which turned out to be pretty quick in CoreData.