• gorilla/context stores global request variables. • gorilla/mux is a powerful URL router and dispatcher. • gorilla/reverse produces reversible regular expressions for regexp-based muxes. • gorilla/rpc implements RPC over HTTP with codec for JSON-RPC. • gorilla/schema converts form values to a struct. • gorilla/securecookie encodes and decodes authenticated and optionally encrypted cookie values. • gorilla/sessions saves cookie and filesystem sessions and allows custom session backends. • gorilla/websocket implements the WebSocket protocol defined in RFC 6455.

• High-level wrappers for common HTTP and WebDAV operations (GET, MOVE, DELETE, etc) Low-level interface to the HTTP request/response engine, allowing the use of arbitrary HTTP methods, headers, etc. • Authentication support including Basic and Digest support, along with GSSAPI-based Negotiate on Unix, and SSPI-based Negotiate/NTLM on Win32 • SSL/TLS support using OpenSSL or GnuTLS; exposing an abstraction layer for verifying server certificates, handling client certificates, and examining certificate properties. Smartcard-based client certificates are also supported via a PKCS#11 wrapper interface. • Abstract interface to parsing XML using libxml2 or expat, and wrappers for simplifying handling XML HTTP response bodies • WebDAV metadata support; wrappers for PROPFIND and PROPPATCH to simplify property manipulation.