TRIBE Group - TRIBE is a self-serve marketplace connecting social media influencers with leading brands to create social media campaigns.
The Internet Arcade - 900+ classic arcade games, no quarters required.
Productbox - Talk with fellow product managers about how you do stuff.
Pac-Man in Google Maps - Play Pac-Man inside Google Maps
SnakeLogic - The puzzle based snake game
Retrobit Game - A monthly subscription box of retro video games