Do you develop on GitHub? You can keep using GitHub but automatically sync your GitHub releases to SourceForge quickly and easily with this tool so your projects have a backup location, and get your project in front of SourceForge's nearly 20 million monthly users. It takes less than a minute. Get new users downloading your project releases today!
http://www.cosmo.org/
I went here this summer, it's in Hutchison, KS, and has a wide range of actual flight hardware from various space missions - including the Apollo 13 CM. There's also an actual SR-71 Blackbird and genuine V-1 and V-2 rockets from WWII.
Worth a trip if you're passing through!