Wingnuts not only have Saga and Standoff to choose from for fan mods. Over the years, several other fan projects were also completed. Make sure to also check out Unknown Enemy. Unknown Enemy is a fan mod of Secret Ops that takes place during the Nephilim Conflict.
There's also ASCII Sector. It started out as a Privateer-inspired game but has moved beyond those aspects. It uses ASCII as a base for gamers to travel through a world still clearly inspired by its Wing Commander roots.