Riva - Email Tracking
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.
Cirrus Insight - Respond to Customers Faster and Update Salesforce from Your Inbox with Cirrus Insight. Start your free 14-Day trial today! No Credit Card Required.
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!
YouTeam - YouTeam is a new, smarter way to outsource.
xZeitgeist - The most popular tweets categorized and ranked, every day