The ArduPilot project is open source and we encourage participation and code contributions: guidelines for contributors to the ardupilot codebase
We have an active group of Beta Testers especially for ArduCopter to help us find bugs: release procedures
Desired Enhancements and Bugs can be posted to the issues list.
Helping other users with log analysis on http://discuss.ardupilot.org/ is always appreciated:
There is a group of wiki editors as well in case documentation is your thing: ardu-wiki-editors@googlegroups.com
Developer discussions occur on drones-discuss@google-groups.com

License

The ArduPilot project is licensed under the GNU General Public License, version 3.

Maintainers

Ardupilot is comprised of several parts, vehicles and boards. The list below contains the people that regularly contribute to the project and are responsible for reviewing patches on their specific area. See CONTRIBUTING.md for more information.

Andrew Tridgell:
- Vehicle: Plane, AntennaTracker
- Board: APM1, APM2, Pixhawk, Pixhawk2, PixRacer
Randy Mackay:
- Vehicle: Copter, AntennaTracker
Grant Morphett:
- Vehicle: Rover
Tom Pittenger:
- Vehicle: Plane
Chris Olson and Bill Geyer:
- Vehicle: TradHeli
Paul Riseborough:
- Subsystem: AP_NavEKF2
- Subsystem: AP_NavEKF3
Lucas De Marchi:
- Subsystem: Linux
Peter Barker:
- Subsystem: DataFlash
- Subsystem: Tools
Michael du Breuil:
- Subsystem: SMBus Batteries
- Subsystem: GPS
Francisco Ferreira:
- Bug Master
Matthias Badaire:
- Subsystem: FRSky
Eugene Shamaev:
- Subsystem: CAN bus
- Subsystem: UAVCAN
Víctor Mayoral Vilches:
- Board: PXF, Erle-Brain 2, PXFmini
Mirko Denecke:
- Board: BBBmini, BeagleBone Blue, PocketPilot
Georgii Staroselskii:
- Board: NavIO
Emile Castelnuovo:
- Board: VRBrain
Julien BERAUD:
- Board: Bebop & Bebop 2
Matt Lawrence:
- Vehicle: 3DR Solo & Solo based vehicles
Gustavo José de Sousa:
- Subsystem: Build system
Craig Elder:
- Administration: ArduPilot Technical Community Manager
Jacob Walser:
- Vehicle: Sub