[Grant Harrington]

I’ll second TimeSlice, https://www.timeslice.us/mac/TS4/index.html

It’s got the ability to group projects, clients, whatever. And you can even set it up so that it only records time spent in a specific application. I’ve got it setup now so that when FCP is the foreground app, it will record time, and when I switch to another app (checking email, websites, etc..) it will pause time and then start again automatically when returning to FCP. That takes setting up, but it’s very flexible and has a comprehensive reporting system. You can export which projects to include in the report, and it exports as tab-delimited.

You can just have manual start/stop editing as well. One thing that based on some of the comments, it does let you edit start/stop times. I started editing today when I got off the phone, forgot to start the timer, and about 30 minutes in check the time of my phone call, and set my start time to that and continued editing and recording my accurate time.