3DR Solo is now Open Source
Really nice drone, especially considering how cheap they are now. 3DR and ArduPilot have breathed new life into it with this release. Though not nearly as hackable as the Elev-8 (or at least just harder to approach with how much there is), it could still be fun to mess with and even today it still gets the best shots in my opinion if you want a camera drone.
https://3dr.com/blog/announcing-opensolo/
https://discuss.ardupilot.org/t/opensolo-initiative-by-the-ardupilot-team/19702
https://3dr.com/blog/announcing-opensolo/
https://discuss.ardupilot.org/t/opensolo-initiative-by-the-ardupilot-team/19702