I ran across a posting on the main geekswithblogs page. Aaron R had written about some projectile physics calcs. It reminded me of some graphics programs I wrote on my HP-48GX. So just for fun I used his sample calc to write a simple ballistics simulator:
Just some simple math, but it was fun. Once I get a group created on Project Distributor, I'll put up the code.
Update: I've put a project and binaries up, you can download at http://projectdistributor.net/Releases/Release.aspx?releaseId=209