jo! is a pure, free Java web server that implements the Servlet API 2.2, JSP 1.1 and HTTP/1.1. It features: HTTP/1.1 including byte-ranges, auto-chunking, pipelining, etc; Servlet API 2.2 (2.3 starting with jo! 1.1); JSP 1.1 (1.2 starting with jo! 1.1); Auto reload of WARs; Hot deployment of WARs.