Reddit List - Tracking the top 5000 subreddits
SmallDevTools - Handy developer tools with a delightful interface
Reddit Check - A tool to check if a URL is on Reddit and going viral
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
University of Reddit - Learn 1,000's of new things, from reddit
TextLab - TextLab is the fastest way to format, prettify, transform, hash, encode, and decode your data instantly!