* [Lego v5.4.0](https://github.com/go-acme/lego) – Let's Encrypt client and ACME library written in Go.

* [Boulder v0.20260825.0](https://github.com/letsencrypt/boulder) – ACME-based certificate authority implementation written in Go.

* [eggsampler/acme v3.8.2](https://github.com/eggsampler/acme) – Go client library implementing RFC8555 (ACME v2) for interacting with ACME certificate authorities.

* [UWAS v0.8.13](https://github.com/uwaserver/uwas) – Unified hosting control panel and web server combining caching, PHP/FastCGI, reverse proxy, load balancing, WAF, and a React dashboard in one Go binary.