GumHub - Sell access to your GitHub repos with Gumroad
Trello Bookmark - Store your bookmarks as Trello Cards
Sourcery AI - Sourcery reviews your code everywhere you work and automatically suggests improvements
GitHub Repository Size - Browser extension to show file and repo size in GitHub
I Code Dis - Discover, submit and upvote the best GitHub repos
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful