Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.
SmallDevTools - Handy developer tools with a delightful interface
Nightler - Find the people. Live the night.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
PartyUP - See videos from the best nightlife venues in your city.
Profitable developer tools database - A database of 103+ hand-curated profitable developer tools