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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. We will update it as we can but users should look to github to generate...
SSHKeychain is a GUI front-end for ssh-agent and ssh-add on Mac OS X. It can store your key passphrases in the Apple keychain, automatically add and remove your keys on various triggers. It also has tunnel functionality.
gSTM is a front-end for managing SSH-tunneled port redirects. It stores tunnel configurations in a simple XML format. The tunnels (local, remote and dynamic) can be managed and individually started/stopped through one simple interface.