These products are placed in UI design & prototyping alongside Sleek. The order reflects how much of Sleek’s category footprint each one covers. It is not a ranking, and no company can pay to appear here.
🎨 The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes, landing pages, dashboards, slides, images & video — real files, HTML/PDF/PPTX/MP4 ex. open-design is open source, written primarily in TypeScript, released under Apache License 2.0. Its repository has 82.7K GitHub stars and 9.6K forks, and was last committed to within the last two weeks. Niched places it in AI coding assistants & agents, UI design & prototyping.
Penpot: The open-source design platform for Product teams that need scalable collaboration. penpot is open source, written primarily in Clojure, released under Mozilla Public License 2.0. Its repository has 57.8K GitHub stars and 3.8K forks, and was last committed to within the last two weeks. Niched places it in UI design & prototyping.
Open-source Claude Design alternative. One-click import your Claude Code / Codex API key. Prompt → prototype / slides / PDF. Multi-model (Claude, GPT, Gemini, Kimi, GLM, Ollama). BYOK, local-first, MIT. open-codesign is open source, written primarily in TypeScript, released under MIT License. Its repository has 7.6K GitHub stars and 800 forks, and was last committed to within the last two months. Niched places it in UI design & prototyping.
SingularityCE is the Community Edition of Singularity, an open source container platform designed to be simple, fast, and secure. singularity is open source, written primarily in Go, released under Other. Its repository has 987 GitHub stars and 119 forks, and was last committed to within the last two weeks. Niched places it in UI design & prototyping.
NorthStar is an open source design system with reusable React components for rapidly prototyping intuitive, meaningful and accessible user experience. It simplifies your work and ensures consistent, predictable user expe. aws-northstar is open source, written primarily in TypeScript, released under Apache License 2.0. Its repository has 214 GitHub stars and 36 forks, and was last committed to about 6 months ago. Niched places it in UI design & prototyping.
ERD Builder Pro is a database design and documentation tool for developers. Build ERDs, flowcharts, notes, and drawings — all in one workspace. erd-builder-pro is open source, written primarily in TypeScript, released under Other. Its repository has 190 GitHub stars and 37 forks, and was last committed to within the last two weeks. Niched places it in Backend-as-a-service & databases, UI design & prototyping.
OpenAurora is a cloud-native database system prototype developed at Purdue University. It is an open-source version of Amazon Aurora. It is designed to enable more research in cloud-native database systems for our databa. OpenAurora is open source, written primarily in C, released under Other. Its repository has 108 GitHub stars and 8 forks, and was last committed to about 5 months ago. Niched places it in UI design & prototyping.
Category placement comes from the classifier and human review, not from a paid submission. A product missing from this page has either not entered the Niched research set or carries no category assignment yet. Absence is never evidence against it. Read the method or submit a missing product.
