nginx is described as '("engine x") is an HTTP web server, reverse proxy, content cache, load balancer, TCP/UDP proxy server, and mail proxy server' and is a very popular Web Server in the development category. There are more than 50 alternatives to nginx for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and BSD apps. The best nginx alternative is Apache HTTP Server, which is both free and Open Source. Other great apps like nginx are Caddy, Træfik Proxy, Ferron and Haproxy.
Tornado is an open source version of the scalable, non-blocking web server. The framework is distinct from most mainstream web server frameworks (and certainly most Python frameworks) because it is non-blocking and reasonably fast.
Serva is an Automated PXE Server Solution Accelerator based on an all-in-one portable multi-server engine including BINL(RIS/WDS), HTTP, FTP, TFTP, DHCP, proxyDHCP, DNS, SNTP and SYSLOG protocols.
Embedthis Appweb is a fast, compact embedded Web server. It is unmatched in efficiency and serves pages at native speed, using an event-driven, non-blocking core to serve multiple requests using minimal resources. It has integrated caching and the ESP "C" Web framework.
Cherokee is a flexible, very fast, lightweight Web server. It is implemented entirely in C, and has no dependencies beyond a standard C library. It is embeddable and extensible with plug-ins. It supports on-the-fly configuration by reading files or strings, TLS/SSL (via GNUTLS...
G-WAN is the fastest available Web server on Windows and Linux.
G-WAN is a small-footprint (under 200 KB) Web server with full ANSI-C scripts (that you just 'edit & play') which are as fast as static pages and which scale orders of magnitude better than ASP.Net C#, J.
Lwan is a high-performance web server with a low disk and memory footprint. It can serve both static content and dynamic content generated by C or Lua code.
nuster is a high performance HTTP proxy cache server and RESTful NoSQL cache server based on HAProxy. It is 100% compatible with HAProxy, and takes full advantage of the ACL functionality of HAProxy to provide fine-grained caching policy based on the content of request, response...
Devd is a single statically compiled binary with no external dependencies, and is released for OSX, Linux and Windows. Don't want to install Node or Python in that light-weight Docker instance you're hacking in? Just copy over the devd binary and be done with it.
Varnish Cache is an open source, state of the art HTTP application accelerator.
Abyss Web Server is a compact web server available for Windows, Mac OS X, Linux, and FreeBSD operating systems.
An optimized HTTP server / library implementation that can be used either as a standalone server or a library. Supported Protocols:
United States
Brazil
Sweden
EU
Japan
It's has really similar functionality