HPN-SSH is a series of performance patches for OpenSSH. By addressing network limitations and CPU limitations significant throughput performance can be realized. Gains of close to two orders of magnitude are possible on long fat network paths.
The official git repo is now available at http://github.com/rapier1/openssh-portable. The Sourceforge repository should not be seen as the canonical repository for HPN-SSH.
PAM module which permits authentication for arbitrary services via ssh-agent. Written with sudo in mind, but like any auth PAM module, can be used for for many purposes.
Authpfng is a new authentication back-end to allow people to sign in to the network administrated by an OpenBSD pf-firewall. Login can be done by ssh, web-based and smb. You can assign traffic quotas and QoS per-user or after a certain bandwidth usage.