Is there a good automatic time tracking tool for Mac OS X I'm searching for an automatic time tracking tool for Mac OS X. I regularly mess up manual time tracking with timers etc., so I want something more automatic:

The application should run in background and track more or less everything I do - which applications are active, which sites I browse, how long I'm idle etc.

It would then list all the things I do in a timeline and let me specify filters like "Xcode in foreground", "browsing developer.apple.com", etc.
Using these filters, I could check how long I worked on what after I left work.

Is there an application which does this? I'm aware of a website and a client for it, but I'm absolutely NOT comfortable with putting all the things I do on some random website.
Not sure it'll do everything you've asked for, but Time Sink is pretty powerful and can generate a variety of reports. Its almost free at $5 and you can try it for 14-days. It can also run in a menu bar only mode so its out of the way.