In a blog post dated January 27, a group of developers has introduced a software project called Concuflight.
While details are light, Concuflight is designed as a piece of software to facilitate group flights. The free software will provide feature-rich software that will integrate with SimBrief and allow users to organize departure and arrival airports, routes, and other details important to the flight. It is not clear if this product will be compatible with P3D, X-Plane, or both.
Working with a team of 2 web developers, the team is still beta testing and has not announced a release date.
If you are interested in more information, or wish to join the beta team, you can join the developers on their Discord.