I didn't see DX-ball 1 on that list. It's a freeware breakout-type game that's extremely well done, IMO. Laser Tank is another freeware title that I thought was a lot of fun.

Oh, and D.R.O.D isn't there either; that game is hands-down better than everything else on that list, IMO.

http://forum.caravelgames.com/viewsitepage.php?id=68026