Trello Bookmark - Store your bookmarks as Trello Cards
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
GitHub Repository Size - Browser extension to show file and repo size in GitHub
Sheetsu - Turn Google Spreadsheet into API
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Dashblock - Turn any website into an API