Last release for assessed work this year (2015).
The Ubuntu-HEX.ova file is an Ubuntu 14.04.3 virtual machine (VM) image that you can use to test out the software on your own computer. Especially useful if you're running Windows. The login to the VM image is pi/raspberry as per the hexacopter. I recommend using VirtualBox to run the VM, and if it hasn't set it up already, to forward ports 80, 5000, 5762 and 5763 from the VM to allow you to view the web page, camera feed and simulator (via mission planner) from your host machine. Github has issues uploading large files, so you'll need something like 7-zip to merge the parts (.001, .002 and .003) back together before you can import the OVA. You will also need to be running a 64-bit OS as this is a 64-bit VM image.
SHA-1 hash of Ubuntu-HEX.ova: 70975889B6F1E2077713E03D9192B755BB564755