w2ui - W2UI is a small JavaScript UI library with a complete set of widgets: layout, grid, sidebar, toolbar, tabs, fields, popup, utilities.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Webix UI - An enterprise JavaScript Library for cross-platform app development with HTML5 JavaScript widgets and easy integration with most popular JavaScript Frameworks.
Invision - Prototyping and collaboration for design teams
Svelte - Cybernetically enhanced web apps
Sketch - Professional digital design for Mac.