Free apps for 1 to 1 MacBook Image

We are setting up the image for our student laptops this week. I'm interested in FREE, high quality applications that we might add to that image. So far we have:
Combine PDFs
Are there any others that you might recommend? Please share them in the comments.
Thank you.
CH
Updated on 1-30-11 thanks to @tburns, @chad_rex and @thompsok
Reader Comments (2)
You got a lot of the best apps. What about Adium?
I found a pretty good list online here: http://www.opensourcemac.org/
Alfred is a great free launcher app.