| adns | adns is an asyncronous replacement resolver library | |
| aqbanking | A library for online banking and financial applications | |
| ccrtp | An implementation of RTP, the real-time transport protocol from the IETF | |
| courier-authlib | Authentification library for the courier mailserver(s) | |
| enet | A relatively thin, simple and robust network communication layer on top of UDP. | |
| farstream | Farstream (formerly Farsight) - Audio/Video Communications Framework | |
| glib-networking | Network-related giomodules for glib | |
| gloox | C++ libraries for development of Jabber client/component/server | |
| gnet | A simple network library | |
| gnutls | A library which provides a secure layer over a reliable transport layer | |
| gsoap | Offers an XML language binding to ease the development of SOAP/XML Web services in C and C/C++ | |
| gssdp | A GObject-based API for handling resource discovery and announcement over SSDP | |
| gtk-vnc | A VNC viewer widget for GTK | |
| gupnp | An object-oriented UPNP framework | |
| gupnp-av | Library to ease handling and implementation of UPnP A/V profiles | |
| gupnp-igd | A library to handle UPnP IGD port mapping | |
| ldns | Fast DNS library supporting recent RFCs | |
| libasyncns | A C library for executing name service queries asynchronously | |
| libbluedevil | A Qt wrapper for bluez used in the new KDE bluetooth stack | |
| libdmapsharing | A library that implements the DMAP family of protocols | |
| libepc | Easy Publish and Consume Library | |
| libesmtp | A library to manage posting mail to a preconfigured MTA. | |
| libetpan | A portable middleware for email access | |
| libgadu | This library implements the client side of the Gadu-Gadu protocol | |
| libgssglue | Exports a gssapi interface which calls other random gssapi libraries | |
| libident | New libident C library | |
| libinfinity | An implementation of the Infininote protocol written in GObject-based C | |
| libircclient | A small but powerful library, which implements client-server IRC protocol. | |
| libktorrent | A BitTorrent protocol implementation | |
| libkvkontakte | KDE C++ library for asynchronous interaction with vkontakte.rusocial network | |
| liblockfile | a library with NFS-safe locking functions | |
| libmicrohttpd | a small C library that is supposed to make it easy to run an HTTP server as part of another application. | |
| libmnl | Minimalistic user-space library oriented to Netlink developers. | |
| libmsn | A reusable, open-source, fully documented library for connecting to Microsoft's MSN | |
| libnetfilter_conntrack | userspace library providing a programming interface (API) to the in-kernel connection tracking state table | |
| libnetfilter_queue | userspace library providing an API to packets that have been queued by the kernel packet filter | |
| libnfnetlink | low-level library for netfilter related kernel/userspace communication | |
| libnice | An implementation of the IETF's draft ICE (for p2p UDP data streams) | |
| libnids | An implementation of an E-component of Network Intrusion Detection System. | |
| liboauth | C library implementing OAuth Core RFC 5849 | |
| liboping | C library to generate ICMP echo requests, better known as "ping packets" | |
| libotr | Off-the-Record Messaging Library and Toolkit | |
| libpcap | A system-independent interface for user-level packet capture | |
| libproxy | A library that provides automatic proxy configuration management | |
| librpcsecgss | Library for RPCSECGSS support | |
| librsync | A free software library that implements the rsync remote-delta algorithm (rdiff) | |
| libsocialweb | A personal social data server | |
| libsoup | GNOME HTTP Library - base library | |
| libsoup-gnome | GNOME HTTP Library - GNOME libraries | |
| libsrtp | Open-source implementation of the Secure Real-time Transport Protocol (SRTP) | |
| libssh | Library for accessing ssh client services through C libraries | |
| libssh2 | A library implementing the SSH2 protocol as defined by Internet Drafts | |
| libtirpc | Transport Independent RPC library (SunRPC replacement) | |
| libtlen | A Tlen.pl protocol library | |
| libtorrent | BitTorrent library with a focus on high performance and good code | |
| libupnp | Portable Open Source UPnP Development Kit | |
| libvncserver | A cross-platform C libraries that allow you to easily implement VNC server | |
| libwww | A general-purpose client side WEB API | |
| libzrtpcpp | A C++ implementation of Phil Zimmermann's ZRTP specification | |
| loudmouth | A lightweight Jabber client library written in C/Glib | |
| net6 | A library that provides a TCP protocol abstraction for C++ | |
| nfsidmap | Library to help mapping IDs, mainly for NFSv4 | |
| nodejs | Evented I/O for V8 javascript | |
| obby | A library which provides synced document buffers | |
| opal | Open Phone Abstraction Library | |
| openslp | Open-source implementation of Service Location Protocol | |
| ortp | A Real-time Transport Protocol (RTP) library | |
| ptlib | Portable Windows Library | |
| rest | A helper library for RESTful services. | |
| rpc2 | Remote procedure call package for IP/UDP | |
| sofia-sip | An open-source SIP User-Agent library | |
| telepathy-farstream | A telepathy-backend to use stream engine. | |
| telepathy-glib | GLib bindings for the Telepathy D-Bus protocol | |
| telepathy-qt | A library for Qt-based Telepathy clients | |
| wt | a C++ library and application server for developing and deploying web applications | |
| wvstreams | A network programming library written in C++ | |
| xulrunner | Mozilla Runtime Environment | |
| zeromq | Fast messaging system built on sockets, C and C++ bindings. aka 0MQ, ZMQ. |