Windows only: SSH client KiTTY adds dozens of new features to the PuTTY terminal client software, including a launcher, transparency, send-to-tray and it even rolls up the windows into the title bar with a hotkey.
KiTTY is a fork of the original PuTTY software, with loads of new features including a portable version that saves all of your sessions and settings into an INI file in the same folder. You can run scripts, and even drop files onto the window to open a pscp.exe window to transfer the file using SCP. You can roll windows up into their title bar with a Ctrl+F12 hotkey sequence, or you can easily access all the commands from the window menu. It's a solid update with loads of new features for anybody that uses the PuTTY client on a regular basis.