https://en.wikipedia.org/wiki/Mosh_(software)
Mobile oriented alternative to SSH, handles connection roaming, updates the screen live waiting on backend. Interesting on crappy internet.
https://www.berrange.com/posts/2011/12/18/multi-factor-ssh-authentication-using-yubikey-and-ssh-public-keys-together/
Article on how to use a YubiKey alongside SSH RSA key based login. Bit of a hack, but it appears to work. Nice.
https://www.yubico.com/
The YubiKey is a USB device which appears to the computer as a keyboard. It has only 1 button, which when pressed, enters a one-time-password and then enter (can be configured). This can be verified against an online server, or offline via a few tools.
http://stackoverflow.com/questions/10731099/byobu-hard-status-line-scrolls-the-screen-when-updating
Explains how to fix putty so it plays nicely with byobu. Requires two settings, Windows > Translation > UTF8, and Terminal > Keyboard > XTerm R6. Haven't been able to verify, but reports suggest it works.
http://www.mindtwist.de/main/linux/5-linux-security/6-how-to-use-one-time-ssh-passwords-on-debianubuntu.html
Very interesting article on how to enable single use password logon for Ubuntu. Requires a thing called opie and a few config file changes. Seems very useful...
http://www.pyrosoft.co.uk/blog/2010/10/27/import-your-own-rsa-ssh-key-into-amazon-ec2/
How to get custom RSA SSH keypairs into EC2. There is one region missing from this post.
http://s2putty.sourceforge.net/
SSH client for Symbian OS for phones like the Nokia E51 and E52.
http://ubuntuforums.org/showthread.php?p=6431157
A thread I started on how to measure ssh bandwidth usage for evaluating satellite internet on the ubuntu forums.
http://www.gentoo.org/proj/en/keychain/
Keychain is a front end for ssh-agent which sets up one ssh-agent session per machine reboot. Useful for unattended backups, and so on, as the key passwords need only be provided once per reboot.
http://denyhosts.sourceforge.net/
DenyHosts blocks hosts after several failed login attempts. It also provides a subscription service where you can share hosts that you block, so as to block attackers before they try the first login.