The 8BIT Team uses Basecamp from 37signals and we’re starting to integrate it even more into our overall process. Since we’re taking this next step we’re looking at all types of desktop apps to complement our always-on type engagement with each other.
BaseApp is one contender, which simply provides a very minimalistic notification system for our projects.
I’ve been using this for a while and I love it paying less than $10 bucks for it was easy. Got any others that you use?