booui is an independent catalog of 299 design systems, component libraries and UI toolkits.
Every entry carries the same fields, so entries can be compared instead of merely listed: category, framework, platform, license, owner, country of origin, GitHub stars, weekly npm downloads and a traffic estimate. 213 of them link to a public repository and 26 publish a Figma library. The systems come from 60 countries.
The catalog is compiled and checked by hand. Metrics are refreshed from the package registries and from SimilarWeb; URLs are re-verified periodically. Systems that shut down are marked as discontinued and kept in place, because a dead system that a team is still running is worth knowing about. Where a system moved to a new address, the entry follows the official successor rather than the abandoned domain.
It does not host component code, mirror documentation, run benchmarks or rank systems by quality. Popularity numbers are reported as they come from the source. Each entry links to the official site, and that is where the authoritative documentation lives.
booui is an independent project, not tied to any of the systems it lists. Suggestions, corrections and new entries are welcome at [email protected] or through the form on the home page.