sing-box

sing-box is an open-source project describing itself as "the universal proxy platform." It is implemented in Go and provides a single platform for running proxy services, with configuration and behavior documented at sing-box.sagernet.org. The repository README is intentionally minimal: it states the project's tagline, links to the official documentation site, and includes the full license text. The license is the GNU General Public License version 3 (or later), with an additional clause stating that no derivative work may use the application's name or imply association with it without prior consent. Copyright is held by nekohasekai (2022). Because the README does not enumerate supported protocols, features, or platform support, those details should be confirmed through the linked documentation rather than assumed. The project is packaged across many distributions, as indicated by the Repology packaging status badge. Typical users are people who need a configurable proxy client or server and prefer a single, actively maintained codebase. The GPLv3 license and the naming restriction are important considerations for anyone planning to fork, redistribute, or build derivative products.