Freckle

This web service acts like a digital office manager and is particularly popular among at-home workers. You input how you (and others) spend your workday and Freckle creates a breakdown of how much activity is being done by each person and on each task while also creating a summary of billable and unbillable hours. It can also give you warnings if a task or project seems to be going off-track or if you've over-scheduled yourself. [From $19/month; web]