Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes.

Package dict implements the Dictionary Server Protocol as defined in RFC 2229.

Package html implements an HTML5-compliant tokenizer and parser.

Package icmp provides basic functions for the manipulation of messages used in the Internet Control Message Protocols, ICMPv4 and ICMPv6.

Package idna implements IDNA2008 (Internationalized Domain Names for Applications), defined in RFC 5890, RFC 5891, RFC 5892, RFC 5893 and RFC 5894.

Package ipv4 implements IP-level socket options for the Internet Protocol version 4.

Package ipv6 implements IP-level socket options for the Internet Protocol version 6.

Package netutil provides network utility functions, complementing the more common ones in the net package.

Package proxy provides support for a variety of protocols to proxy network data.

Package publicsuffix provides a public suffix list based on data from http://publicsuffix.org/.

Package spdy implements the SPDY protocol (currently SPDY/3), described in http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3.

Package webdav etc etc TODO.

Package websocket implements a client and server for the WebSocket protocol as specified in RFC 6455.