Envelope is a wrapper to FlameRobin project, used as a workaround for third party bugs and features that cannot/should not be fixed within FlameRobin project. It is also a bridge between public open source projects and their private use.
Envelope-for-FlameRobin is actually a fork of FlameRobin project. Envelope-for-FlameRobin team is not related with FlameRobin team.
Envelope-for-FlameRobin is an extremely thin wrapper around http://www.flamerobin.org/ that uses the FlameRobin license https://github.com/mariuz/flamerobin/blob/master/LICENSE. The FlameRobin project, included as an unofficial submodule (./native folder), has its copyright and license holders kept as is.