A type-safe HTTP client for Android and the JVM
Square’s meticulous HTTP client for the JVM, Android, and GraalVM.
Feign makes writing java http clients easier
Eclipse Jetty - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Java HTTP Request Library
Unirest in Java: Simplified, lightweight HTTP client library.
http-kit is a minimalist, event-driven, high-performance Clojure HTTP server/client library with WebSocket and asynchronous support
Asynchronous Java made easier
A Java HTTP client for consuming Twitter's realtime Streaming API