Free flash first person shooter. It´s great:
http://www1.rasterwerks.com/game/phosphor/beta1.asp
Ever wanted to download the videos from YouTube, Google, etc.? Try this:
http://keepvid.com/
Only in .flv format? No problem... There´s links for a free .flv player and a conversion program (not free but you can download a max 90 sec. demo).