Vision doesn't sell games...

[A Black Falcon]

HOWEVER, these are freeware games that aren't sold either at retail or online. Whether I get it or not, the company that made it still does not get a single dime from me.

True. Doesn't make them any less interesting though.

GLTron - European (game in English) game based on the Tron Lightcycles part. There are several other freeware Lightcycle games (that old DOS Tron lightcycle game, Cycles 3d, Lightbikes, etc), but this is the best one...

Guxt: new little shmup from the Cave Story people.
Gal Pani X: Qix-style, with anime character art backgrounds (mostly To Heart characters :)) Pretty good game.
Sipiri Gauntlet: by the creator of Gal Pani X, Gauntlet-style with female anime-style characters and amusingly bad English (what minimal text it has). HARD! Long with no saving...
Miko-san's Miracle Board: 3d puzzle-ish platformer game... kind of frusterating since it doesn't save.
Torus Trooper - one of Kenta Cho's best (A7Xpg is another one of my favorites of his)
SCWU: as you say, kind of crazy... cool though, even if I don't get 90% or more of the costume references. Other Japanese freeware fighting games I've played include Fighters Kyodotai (if I got the name right) and Dogma (unfinished, but it's got Kanon characters...).
Natuki: interesting little platformer with a grabber item thing so you hang from celings and swing around and stuff to solve the levels.