Flingster - Flingster lets you find local flings for random dates with people from your area.
Hinge - Find people you want to date through your friends on Facebook.
Manjam - Manjam is the social network for gay men and their friends.
Cuddli - Dating for geeks
Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.
Tinder - Tinder is how people meet. It's like real life, but better.