Feign makes writing java http clients easier
http-kit is a minimalist, event-driven, high-performance Clojure HTTP server/client library with WebSocket and asynchronous support
The easy HTTP client for Groovy (and Java).
Convenient http client for java, inspired by python request module
Fast Parallel Async HTTP/SSH/TCP/UDP/Ping Client Java Library. Aggregate 100,000 APIs & send anywhere in 20 lines of code. Ping/HTTP Calls 8000 servers in 12 seconds. (Akka) www.parallec.io
a curl-inspired but java based http command line client
Unirest in Java: Simplified, lightweight HTTP client library.
A type-safe HTTP client for Android and the JVM