TransGear Airways is a group of people from the FlightGear community, gathering once a month. At coordinated times, each pilot will depart from his/her respective home base on the "spokes" of TransGear's airway network, and convene together at its "hub", before exchanging passengers and flying back to their home base. While realism is one of the aims of the gatherings, everyone is welcome, as long as one is trying to follow more or less realistic procedures.
The website reports this airline is defunct in 2012.