Sketch Repo - Collection of resources for anyone who uses Sketch
Connection Flow Arrows - Create connected arrows for sitemaps & user flows in Sketch
Anima App - Design, get feedback, convert to code, publish, iterate.
Page Flows - User flow design inspiration for mobile & desktop
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Makers.so - A website builder inside Figma.