The Macromedia Flash site offers up a better than average Street Fighter style Brazilian fighting game with surprisingly fluid graphics, rendered in, obviously, Flash. Capoeira Fighter 3 lets you fight with a friend in two-player mode, or you can take on the computer, or, if you're particularly hung over, let the computer fight itself while you sit there slurping coffee, calling whichever player you decide to root for a pussy when it loses. There are twelve different characters with eight different fighting powers, and nine different environments in which to fight with them. Bit of a wait for dial-up users, but not prohibitively.

Capoeira Fighter 3 [Macromedia]