Toolabs DSM - Design System Manager plugin for creating themeable designs
Carrd - Simple, responsive one-page site creator.
Evie by unDraw - MIT licensed illustrations for your next project
Snappykit - New way of creating websites for mobile apps.
Haiku - Haiku is an open source OS catered specifically to the needs of personal computing.
InVision Design System Manager - Create and maintain your design system at scale.