Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Q-Stats - Get free marketing insights for every question on Quora.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Site Rank Data - View historical rank information of websites via time series charts.

Facebook Local - Discover places to go and events happening near you

Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more