Rainglow Color Themes - 320+ color themes for a variety of editors and software.
StickerPop API - Embed all the best stickers and GIFs into your apps.
Slack Themes - Make your Slack pretty with custom themes
Zimit - Configure price quotes for services
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.
Acrylic Charms by Sticker Mule - Add some charm to your life.