Some interesting uses of the browser such as automatically searching for quest hints are being discussed on the interface board:
However, nearly every developer here uses open source tools daily. JUnit and Ant are everywhere, as well as NUnit, NDoc, and NAnt for the
For one project, the dev team created a post-project list of all the software used during development. Out of about 30 programs (including DB, OS, etc), 2/3rds were open source.
The sooner you fall behind, the more time you have to catch up.