TimeSnapper is like Fraps for day-to-day productivity apps. Fire it up and it sits in the background and takes a screenshot every X seconds and writes that to a directory naming the files sequentially.
The developer bills it as a method for tracking project-related work time,
With TimeSnapper you can play back your week just like a movie. You can play it at any speed you like, and jump in at any time you like.
When it’s time to fill out that dreaded timesheet, TimeSnapper is a savior. No need to tear your hair out trying to remember where all the time went.
Personally, I’m just obsessively drawn to these types of apps.
Anyway, its freeware and on my laptop only uses about 4-5 megabytes of RAM.