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.
Startup Stash - A curated directory of 400 resources & tools for startups
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!
Startup Buffer - Startup Buffer is a premium startup directory for emerging startups all around the world.
xZeitgeist - The most popular tweets categorized and ranked, every day
Makerbook - A directory of the best free resources for creatives