Rainglow Color Themes - 320+ color themes for a variety of editors and software.
Sweet Themes - Color Themes for Slack
Slack Themes - Make your Slack pretty with custom themes
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
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.
3Box - Secure, private, decentralized user data storage