H2O (web server)

H2O is a free and open-source web server software.
It is written in C, and is distributed under the terms of the MIT License.
Overview.
It is designed on the presence of HTTP/2 and TLS, and maximizing the use of HTTP/2 technologies such as prioritization and server push, it achieves significantly better performance than conventional web server software such as nginx.
Features.
H2O has the following key features:
History.
In , H2O started development by as a mobile game server inside DeNA.
The initial version was released in , and the first stable version was released in when the HTTP/2 specification was finalized.