Stackshare - StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.

SalesOptimize - Selling to online retailers? Revolutionary sales lead generation search engine driven by deep web analytics

Techmap.io - Techmap is a workplace search engine to find companies using technologies (e.g., Rails, PHP, Java, etc.) that are used internally. Finally, a "Google for Workplaces" that helps people find a place to work with technologies they love!

Elucify - A completely free software tool that uses crowdsourced data to find business email addresses

xZeitgeist - The most popular tweets categorized and ranked, every day

amoCRM - amoCRM is the world’s first messaging-powered CRM.