DhcpdByPort is a Perl script to generate ISC dhcpd configurations to assign IP addresses on a per switch port basis, like in a hotel environment where each room (socket) must always be given the same IP. Layer 3 ACLs for recent layer 2 Cisco switches are also generated to enforce the given IP address usage as a source IP.
jlip is a SLIP-driver with additional features like one logical link over many physical lines (multiline), IP-over-TCP tunnelling with public key hosts authorization (elliptic curves) and data encryption (blowfish with 112-448 bits key) for VPNs (Virtual Private Networks). It currently works under FreeBSD only and there are no english docs. A russian to english translation is welcome.
MobileMesh is a collection of non-proprietary protocols and software tools which provide media independent mobile ad-hoc networking capability. The protocols have been documented in Internet Drafts and submitted to the IETF's MANET Working Group. These drafts are included in the software distribution. Each MobileMesh protocol is implemented as a separate software tool. A network visualization tool is also provided which displays the topology of the mobile ad-hoc network in real time.
NetInfo is a directory service that was developed at NeXT Computer, Inc. Until LDAP, it was one of the only extensible, hierarchical, attribute-value directory services that could be used for managing NIS information. NetInfo was architected by the same person that designed NIS. Our port of Apple's Darwin NetInfo code includes an nss_netinfo module which integrates NetInfo with the GNU C Library, for transparent resolution of users, hosts, etc.
OpenSSG is an implementation of the Cisco Service Selection Gateway, which is available on IOS devices with the required feature image. It uses libipq for user-space packet inspection. Traffic flows of unauthenticated users are redirected to a SESM (Subscriber Edge Service Manager), where they are authenticated by whatever means (an HTTP server with a database backend, or a telnet server). Upon authentication, the user is authenticated with a certain IP and this is sent to the SSG server.