Herqq UPnP (HUPnP) is a software library for building UPnP devices and control points conforming to the UPnP Device Architecture version 1.1. It is designed to be simple to use and robust in operation. It is built using the Qt framework, following many of the design principles and programming practices used in the Qt framework. It integrates into Qt-based software smoothly and enables truly rapid UPnP development.
PICI-NMS is an object oriented middleware which makes possible sending messages in a networked environment or on a single host between applications using the library provided. The supported message sending mechanism is "publish/subscribe" and this is backed up by a very easy-to-use and intuitive C++ API which hides the underlying socket interface to make the message sending as transparent to the client as possible.
CloudVPN is a secure decentralized mesh networking tool. It allows applications to use it as a mesh transport layer for packet routing, easily creating mesh ethernet VPN, secured audio/video broadcasting or communication channels, etc. It can create secured networks with special or weird topologies, so it's very easy to create connection schemes with clustered/decentralized servers, topologies with better throughput, ring-like topologies for failover, long-line for passing through many routes, or tree topology for optimizing inter-server bandwidth needs.
Open DHCP Server is full fledged, all purpose DHCP server. It supports nearly all industry standard functionality. It supports both dynamic and static leases, multiple domains, multiple subnets, and relay agents. It also supports BOOTP and PXEBOOT. It allows user-defined options, which can be global, range-specific, or client-specific. DHCP ranges can be further filtered by MAC address ranges, Vendor Class, or User Class.
Simple Sockets is a cross platform socket library. It is different from other socket libraries which mix the application protocol and transport protocol layer (i.e. TCP sockets, UDP sockets, HTTP sockets, etc). This library focuses specifically on the transport protocols. Its features include blocking/non-blocking sockets, polling, thread safety, and signal safety.
The Shrew Soft VPN Client for Unix is a free IPsec Client for FreeBSD, NetBSD, and Linux based operating systems. It can be used to communicate with systems running ipsec-tools. The Unix client utilizes the IPsec kernel support included with the operating system, and comes with the complete Internet Key Exchange daemon and client front end application source code. A Windows version is also available.