OnLife is pretty neat OS X application that keeps track of your application use (currently supports Firefox, Mail, iTunes, Safari, TextEdit and iChat.) I fired it up, and kept it running today. It plots points on a graph of actions you took with an application (ie. visit a web page, listen to a song, read an email.) It then caches the contents of those items and allows you to search for them later. It is what a browser history should be. You can search for words found inside all the web pages you’ve visited, not just looking/searching titles by time like most browsers. The graphing piece allows you to get a good idea how you work and what you were up to. Click the picture to get a graph of my application use from the time I installed it until 5:00 pm.