Payload CMS - Headless CMS and Application Framework built with Node.js, React and MongoDB
Rainglow Color Themes - 320+ color themes for a variety of editors and software.
DatoCMS - Connect DatoCMS to your favorite site generator, build the perfect backend and deploy anywhere you like.
Slack Themes - Make your Slack pretty with custom themes
Flamelink.io - Flamelink.io is a headless CMS for Firebase.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.