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Proxies are special objects which serve as mostly-transparent wrappers around another object, intervening in the apparent behavior of the wrapped object only when necessary to apply the policy (e.g., access checking, location brokering, etc.) for which the proxy is responsible.

Getting network addresses from Python It's been irritating me for ages that it isn't possible to straightforwardly get the network address(es) of the machine you're running on from a Python program.

PyGopherd is a modern dynamic multi-protocol hierarchical information server with a pluggable modularized extension system, full flexible caching, virtual files and folders, and autodetection of file types -- all with support for standardized yet extensible per-document metadata. PyGopherd is designed to serve up files using the Gopher Internet protocol. With Gopher, you can mount a filesystem (viewing files and folders as if they were local), browse Gopherspace with a web browser, download files, and be interactive with searching. But this is only part of the story. The world of Gopher is more expansive than this. There are two major gopher protocols: Gopher0 (also known as RFC1436) and Gopher+. PyGopherd supports both. PyGopherd also fully natively supports HTTP, the protocol used on the Internet for most Web transactions. So, you can access a PyGopherd server using anything from a small, 20-line client in mobile phone to a massive 50-MB web browser.

pynids is a python wrapper for libnids, a Network Intrusion Detection System library offering sniffing, IP defragmentation, TCP stream reassembly and TCP port scan detection. Let your own python routines examine (or kill) network conversations. pynids is free software, licensed under the GPL.

qadsl (GNU Alive) is a small utility to login on the Telia AB ADSL service. It also works fine with COMHEM Cable internet and Tiscali Internet services. It features a keep-alive daemon with login/logout functions. The daemon periodically connects to the ISP to ensure you are not logged out.

QOAuth is an attempt to support interaction with OAuth-powered network services in a Qt way

AnyEvent::Twitter::Stream - Receive Twitter streaming API in an event loop

C++ Qt based Twitter library

IO::Socket::IP provides a protocol-independent way to use IPv4 and IPv6 sockets, as a drop-in replacement for IO::Socket::INET. Most constructor arguments and methods are provided in a backward-compatible way. For a list of known differences, see the IO::Socket::INET INCOMPATIBILITES section below. It uses the getaddrinfo(3) function to convert hostnames and service names or port numbers into sets of possible addresses to connect to or listen on. This allows it to work for IPv6 where the system supports it, while still falling back to IPv4-only on systems which don't.