Get free HTTPS certificates forever from Let's Encrypt
Powerful, enterprise-ready, open source web server w/ automatic HTTPS
HTTP web server index for Apache httpd, lighttpd and nginx
Lightweight service virtualization/ API simulation / API mocking tool
Make writing Java http clients easier
Zenko CloudServer open-source Node.js implementation of S3 protocol
Rust HTTP types
Asynchronous HTTP client/server framework for asyncio and Python
An HTTP inspector for Android & OkHTTP (like Charles but on device)
TCP/HTTP/UDP/QUIC client/server with Reactor over Netty
A minimal, idiomatic Scala interface for HTTP
Eclipse Jetty - Web Container & Clients - supports HTTP/2, HTTP
A high-performance HTTP benchmarking tool
Clojure HTTP server/client library with WebSocket support
The Functional toolkit for Kotlin HTTP applications
Up to 100x Faster FastAPI. JSON-RPC with io_uring, SIMDJSON
WireMock.Net is a product for stubbing and mocking web HTTP responses
Hurl, run and test HTTP requests with plain text
Network application framework for protocol servers and clients
Generate Swift client and server code from an OpenAPI document
C++ parallel computing and asynchronous networking engine
The most advanced tool for HTTP API
An easy to install Apache distribution containing MySQL, PHP, and Perl
True object-oriented Java web framework without NULLs