Rainmaker - Rainmaker allows you to make your Google Contacts better.

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

Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.

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

dip - accountability groups for developers

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