Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Startup Notes - Most actionable advice from each Startup School speaker
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Startup Fucking Advice - A humor-based website that gives random startup advice.
Bigtent - BigTent is a web-based organization and communication portal for groups.
First Search - The world's best startup advice, curated and searchable.