ManicTime

ManicTime is a time clock software, which helps you keep the accurate time of your project work. It runs in the background collecting data and screenshots of your computer usage. When you are ready, you can review collected data, which tells you things like when you were at lunch, which applications you used and the sites you visited. This information in combination with screenshots will jog your memory, so you can easily remember what you worked on. Based on all this data you can then accurately assign your work-time to your projects.