Refine - A React Framework for building internal tools, admin panels, dashboards & B2B apps with unmatched flexibilty.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Blitz.js - Rails-like framework for React apps, built on Next.js
OmniGraffle - OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
React-Static - A progressive static-site framework for React!
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project