Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.

TechEvents.co - Tech and startup events aggregator

Sameroom - Chat interoperability-as-a-service

Facebook Local - Discover places to go and events happening near you

Investis - Investis helps companies to use digital channels to increase revenue, enhance employee engagement and influence corporate audiences.