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.
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.
pppd-sql is a plugin for the Point-to-Point server (pppd) on Linux and Solaris that adds an authentication backend using a MySQL or PostgreSQL database for the Challenge Handshake Authentication Protocol (CHAP) and Password Authentication Protocol (PAP). It supports MS-CHAPv1 and MS-CHAPv2 too. The IPCP negotiation after authentication handshake is also supported. pppd-sql supports a flexible configuration scheme, has concurrent connection handling for single users across multiple tunnel servers, and comes with easy and handy documentation.
Campagnol is a distributed IP-based VPN program able to open new connections through NATs or firewalls without any configuration. It uses UDP for the transport layer, and utilizes tunneling and encryption (with DTLS) and the UDP hole punching NAT traversal technique. The established connections are P2P.
IPv6 CARE, "IPv6 Compliant Automatic Runtime Environment", provides an environment where applications instantly become IPv6-compliant ('patch' mode, see RFC6535). It can also generate a diagnosis about the IPv6 compliance of an application ('check' mode). It uses an LD_PRELOAD-based library injection technique.
Complemento is a collection of tools for penetration testing. LetDown is a TCP flooder written after reading the Fyodor article "TCP Resource Exhaustion and Botched Disclosure". Reverse raider is a domain scanner that uses brute force wordlist scanning for finding a target's subdomains or reverse resolution for a range of IPs. Httsquash is an HTTP server scanner, banner grabber, and data retriever. It can be used for scanning large ranges of IPs for finding devices or HTTP servers.
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.
NOC Project is an Operation Support System (OSS) for telecom companies, service providers, and enterprise Network Operation Centers (NOC). Areas covered by NOC include fault management, performance management, service activation/provisioning, knowledge base, multi-VRF address space management (IPAM), multi-vendor configuration management, DNS provisioning, peering management, RPSL and BGP filter generation, and reporting.