[Splash]

I've played a bit with Librepilot with a new CC3D flight controller.  It is very cool.  The thing is, the technology moves along in regards to flight controllers.  There are newer flight controllers by Omnibus, Matek, BrainFPV and others.   They are using the STM F4 and F7 microcontrollers.

The CC3D and other older technology platforms work great. But, if you reach the limits and can't find much help there are Adruplane and INAV.  On Facebook, you'll find support communities.   The newer technologies have built in OSDs that give you crucial flight data such as altitude, heading, distance away you're flying, RSSI, and stabilized flight modes.    There is also the failsafe of "return to home" which brings your plane back when you fly out of range.  The newer flight controllers have built in camera switchers which allow you to use two FPV cameras.

If your needs are simple, librepilot is more than enough.  But if you are wanting to do things that Librepilot cannot do, there are alternatives.

[TheOtherCliff]

CC3D memory is full, so LibrePilot does not put all it's features into CC3D.

All of the functions that you mention are supported by LibrePilot when using Revo class FC's, but there are only three such FC's supported.  If you want OSD, you add a supported OSD board, but there is even a dev branch that supports a simple display on the Omnibus F4 Pro built in OSD.  If you want multiple video channels, that is supported with add-on boards and controlled by simple aux channel pass through.  Everything you mention (RTH, data AH home arrow etc. on the OSD, etc.) is supported.

[jdl]

LibrePilot also supports the Revolution FC embedded radio module for UHF radio-control & telemetry (OpLink @433MHz).

This feature (in addition to the open source project) is one of the main reasons to build all my recent (and probably next few ones) autonomous and long-range UAVs (planes and mini-sized multirotors) on LibrePilot base.