Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Fugue - Free and premium stock music for your videos, games, and UI
Event Hunt - Startups and Tech Events Curated By Locals
UI Sound Kit 2 - A new pack of 130 clean and neat UI sounds for app makers
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Soundkit - Professional sound effects library designed for UI projects