Shapr - A completely free way to build your professional network.
PenPal World - Connect with people all over the world
Wildcard - Discover, connect and meet people at communities
InterPals - InterPals is a friendly community of over 5 million friends, language learners, travelers and penpals.
LetsLunch - Do more with your lunch hour. Meet new people.
Polyglot Club - Polyglot Club is a new social network for language learners.