Anyone here using time tracking software for billing?

[jmroberts70]

I've been an independent contractor for a while now and I'm getting tired of tracking my project hours by hand. Is there a decent app out there that will run in the background and keep track of the hours I've logged for each project I'm working on? I'd like it to be able to spit out decent reports too. I managed to play with Klok for a little while but found it to be terribly lacking in the ability to submit reports. I also tried actiTIME which was a hopeful solution as it's web-based and I'd like the portability of such a thing but they only allowed you to manually enter the hours for each project. I'd like an app that can track my hours in the background so I don't have to.

What do some of you guys use?