A problem that I had when looking for task tracking tools a while back is that the majority are just more complicated than I needed. I needed the equivalent of a whiteboard list on a website.

So I made a nifty little thing I called Millwright [http://thelinell.com/Millwright/]. It's certainly not as "fully featured" as the trackers on this list, but that's why I like it. It's ridiculously simple so that you can focus on the tasks instead of the process.