Balsamiq

My manager showed me this great tool for making UI mockups today.  It's called Balsamiq and is available as both a web and desktop application.

More information on Balsamiq can be found here: http://www.balsamiq.com/products/mockups

Google Wave

Google are developing a new communication and collaboration tool that will run through the web browser. I'm keen to try this out and looking forward to its release.

Here is a preview.

http://wave.google.com/