1. How many of me: http://howmanyofme.com/search/
"Find out how many people in the U.S. have your name."
2. Mario tetris: http://www.ebaumsworld.com/games/play...
"Play the classic Mario game, press the space bar to help Mario tetris style."
3. Gobarbra: http://gobarbra.com
"Remember the 'Barbra Streisand" song? customize it with your own message!" (One of my favorites)
4. In bflat: http://www.inbflat.net/
"It shows a bunch of videos that are on the same key."
5. Whack black: http://www.mofunzone.com/online_games...
"Do you hate Rebecca Black? today's your lucky day."
6. Psychologist for animals: http://www.parapluesch.de/#
"Here you play as a psychologist, evaluating animals and administering drugs."
7. Vsauce symphony: http://www.youtube.com/watch?v=zvtlAa...
"Video of a guy who made a song using Musical dots (http://collegehumor.com/i/musical-dots)
"Here you can drag any image and it'll begin to warp and twist."
"Fly through the clouds using your mouse."
10. Mrdoob balls in browser: http://mrdoob.com/projects/chromeexpe...
"Interact with some balls that are lying around."