Apache CloudStack is an opensource Infrastructure as a Service (IaaS)
Web server for Lad
An embedded web server
A cross-platform asynchronous HTTP(S) proxy server in C#
Outline Manager, developed by Jigsaw
μWebSockets for Node.js back-ends
Asynchronous HTTP client/server framework for asyncio and Python
An SSH/Telnet/Serial client in your browser
A simple server for sending and receiving messages in real-time
Enhanced Apache Server Status page - for one or multiple servers
Powerful, enterprise-ready, open source web server w/ automatic HTTPS
A frontend for an IPFS node
Get free HTTPS certificates forever from Let's Encrypt
External configuration (server and client) for Spring Cloud
Open source enterprise search server for websites, files, and data
WireMock.Net is a product for stubbing and mocking web HTTP responses
Cross-platform multi-protocol VPN software
HTTP web server index for Apache httpd, lighttpd and nginx
A Fast Reverse Proxy
Eclipse Jetty - Web Container & Clients - supports HTTP/2, HTTP
An ASGI web server, for Python
Compact & Fast Web Server
Node library to automate Chromium, Firefox & WebKit with a single API
Lightweight, powerful flow control component
Clojure HTTP server/client library with WebSocket support