Anima App - Design, get feedback, convert to code, publish, iterate.
Source Wireframe Kit - Library of 537 blocks for desktop and mobile prototyping
Timeline for Sketch - Create beautiful timeline animations in Sketch
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
BuilderX - Design to code, designers and developers on one platform.
Platforma - Wireframe library of layouts and UI elements