TimeSnapper - TimeSnapper is an Automatic Screenshot Journal. Play back your week just like a movie.
ScreenMeter - Employee time-tracking software with automatic screenshots. $1 per user per month. Free trial.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Monitask - Employee Monitoring Software with Screenshots, Internet, Activity and Time Tracking
Qbserve - Freelance time tracking, invoicing, and productivity improvement
TeamLogger - Simple, employee time-tracking software with automatic screenshots and activity level monitoring. $1 / User / Month.