Hunter TechLookup - Create lists of websites by technology for free
100 under 100 - For those of us that didn't get into Forbes' 30 under 30
Setalist - The easiest way to make awesome lists for the internet
#IWriteBecause - Every author has a story to tell, what's yours?
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!
Twitter Archive Eraser - Delete thousands of your tweets in one go —Well beyond the 3200 limit.