Rainglow Color Themes - 320+ color themes for a variety of editors and software.
GrowthList - A crowd-sourced list of growth hacks
Slack Themes - Make your Slack pretty with custom themes
GrowthHackers Projects - Growth collaboration software for teams 📈
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.
Marketing Examples - A gallery of real world marketing case studies. Updated every day.