Couchers.org - The new alternative to Couchsurfing. Non-profit. Community-focused. Well built.
Shapr - A completely free way to build your professional network.
Couchsurfing - CouchSurfing is your ticket to explore the world -- from the road or from your own home.
Event Hunt - Startups and Tech Events Curated By Locals
Trustroots - Travellers community for sharing, hosting and getting people together.
GetReal - Meet new people, in person