Milofy - Socialize with other like-minded couples
WhosDown - App where you can genuinely make friends—connecting with someone that shares a common interest
Open Cult - A place for people with common interests to meet IRL.
The Bosco - High tech photo-boothing for any event
Speciface - Instant access to contact information of people nearby
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.