Anima App - Design, get feedback, convert to code, publish, iterate.
Toole - Search for and discover online tools
Sketch Repo - Collection of resources for anyone who uses Sketch
Uxcel - The easiest way to learn UX/UI design
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.