Downloading nginx 1.22.1 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. This free program is a product of Igor Sysoev. The following versions: 1.11, 1.9 and 1.8 are the most frequently downloaded ones by the program users. The software is included in Development Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
Nginx for Windows is an HTTP and reverse, a mail, and a generic TCP/UDP proxy server.
Among numerous basic HTTP server features it boasts of Serving static and index files, autoindexing; opening file descriptor cache. It provides accelerated support with caching of FastCGI, uwsgi, SCGI, and memcached servers. Besides that it works with Name-based and IP-based virtual servers. You are also offered embedded Perl among other numerous features.
You may want to check out more software, such as Wnmp, WonderCMS or WebLog Expert Lite, which might be similar to nginx.