YouTube Auto HD + FPS
Watch all YouTube videos in HD (including outside of YouTube.com), according to the FPS you set! Has 100,000 users on Google Chrome.
YouTube Time Manager
Manage your precious time on YouTube! Has 8,000 users on Google Chrome.
YouTube Like-Dislike Shortcut
Shift+Plus to like, Shift+Minus to dislike. Can't get any simpler. Has 4,000 users on Google Chrome.
Skillshare Player Control
Control the Skillshare player as you'd control the YouTube player. Has 1,000 users on Google Chrome.
Twitch Channel Points Bonus Collector
Auto-clicks the Channel Points bonus button when it appears. Has 8,000 users on Google Chrome.
SteamCMD GUI
A desktop GUI application used to setup game servers that can be downloaded via SteamCMD.
Screenshot: 
Accurate data converter
Convert data from one unit to another!
Time converter
Convert time from one unit to another!
Team Fortress 2 server.cfg Generator
Generate a server.cfg file for your TF2 server!
Counter-Strike 2 server.cfg Generator
Generate a server.cfg file for your CS2 server!
Garry's Mod server.cfg Generator
Generate a server.cfg file for your Garry's Mod server!
Nine Calculator
Turn any number into 9!
Four Calculator
Turn any phrase/number into 4!
Fibonacci Calculator
Calculate any Fibonacci sequence!
Palindrome Calculator
Turn any number into a palindrome!