The Internet Arcade - 900+ classic arcade games, no quarters required.
Gestimer - For those little reminders during the day
Pac-Man in Google Maps - Play Pac-Man inside Google Maps
Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
SnakeLogic - The puzzle based snake game
XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!