Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
Root UI Kit - Wireframe & design starter kit 🛠️
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Figkit - Figkit is a wireframe library for Figma to communicate and design great user interfaces for desktop and mobile.
Invision - Prototyping and collaboration for design teams
Tetrisly - Starter kit for design systems and wireframes builder (Sketch/Figma)