This is a modified version of Time Management from An App A Day. I made changes and created a click once application out of it and decided to release it to the wild. It is distributed under the The GNU General Public License (GPL)
App Tracker allows you to keep track of what you are doing on your PC. The application resides in the systray, and writes to a CSV file each time you switch applications, or the title bar of the current app changes. Original application can be found at http://anappaday.com/downloads/2006/09/day-2-time-management.html
If you press Ctrl+Win+A you can add a manual entry and iff using ie9 it will try and pull the URL for you.
Click here to install:App Tracker (555 downloads)
Click here to grab the code, this is the process of being moved to codeplex:Application Time Manage Source (559 downloads)