PartyUP - See videos from the best nightlife venues in your city.
Roomvine - Chatrooms for real life venues, neighborhoods and events
Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.
Spectrum - Browser-based app to visualize the frequencies of an audio file.
Partle - Revolutionizing the way people get together
CityBugs - Improving cities to make them a better place to live in.