Welcome aboard! - Star Trek Channel | A continuing journey. -- has a big list of Star-Trek fan movies and series episodes, and also their production groups. I've watched some of them, and some of them are rather impressive productions. It certainly helps that one can use CGI for outer-space scenes and special effects.
There is now a large number of such productions, and I haven't seen enough of them to get a good overall picture of them. Judging from the uniforms, it's mainly TOS-era ST that's represented, with some TNG/DS9/VOY-era ST and a bit of ENT-era ST. No post-reboot ST seemed in evidence from what I saw.