Better Notes - Simple notes app that ties notes together with #hashtags
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Great F*cking Startup Advice - Strongly worded suggestions for startup founders
Event Hunt - Startups and Tech Events Curated By Locals
Whimsical - The visual workspace for teams.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets