Social Network Search

Facebook

The worlds largest social network.

Instagram

Owned by Facebook, more focused on pictures and image filters, chatting with friends.

LinkedIn

The worlds largest business network, owned by Microsoft.

Twitter

Not just a social network, a favorite of journalists and others looking for real-time news.

Google+

Google's social network. Integrates with the Google ecosystem.

Reddit

A topic-based social network where people ask questions, discuss issues, and more.