Hunter TechLookup - Create lists of websites by technology for free
Top Authors - A leaderboard for Medium Authors
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!
Marvel Embeds - Embed interactive prototypes on any site (including Medium!)
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.
100 under 100 - For those of us that didn't get into Forbes' 30 under 30