Better than Nemesis…
A bunch of Trek fans have lovingly created this: Starship Exeter— an Original-Series-period adventure of a different crew, with CG special effects and some brilliant costumes, sets and sound-effects. The acting? Eh. Not great, but it’s obvious that they love what they’re doing. Who wouldn’t? The episode is broken up into three acts plus teaser and tag, as Quicktime files (mirror sites have it available in MPEG). Great stuff.