So I downloaded a copy of UW Calendar and am test-driving the application; I need to set up a calendar application. My first impression is kind of mixed. It's not that bad, but while I appreciate their licensing terms (BSD) and time and effort they put, I am not too sure if I can just deploy and tell people to start using it. Perhaps, it's more matured than I think. Maybe I need to experiment more.
I also plan to look into Totos (http://www.tutos.org/); I'll see.