Klok

I like that it's very simple to use and easy to keep multiple projects up-to-date, even moving time entries to a different project if necessary.

Klok makes it very simple to track time spent on various tasks. I like that you can track multiple projects and pull up multiple reports for invoicing.

Adobe AIR makes it possible to run on all major desktop Operating Systems Great for the Freelancer Attractive Interface Usable Interface Has Free version available NO NEED TO INSTALL DATABASES!!! This is a big one for me. All the Linux Time management applications require a backend database to be installed. Klok just works out of the box Time tracker included. NO ONLINE ACCESS NEEDED. Maybe for the premium features such as cloud storage, but if you don't want to need the internet for everything this is great.