retty is a utlity that can attach to processes running on another terminal. This is useful, for example, when you run an application locally and then decide you want to use that running application from some remote location. You can run retty on it, do your work, and detach application back again. Its advantage over screen is that you don't have to run the processes on retty in advance.
WmConsole is a console server for Windows Mobile devices which listen over BlueTooth RFCOMM channels. It allows the user to interact with the device using a commandline interface from a Linux or Windows workstation. You need the QTTY Linux/Windows client to access a WmConsole server.
krd eases the configuration and utilization of multiple connections to remote desktops. It's a rdesktop and VNC wrapper. You can configure almost all rdesktop and xtightvncviewer parameters and copy/paste/rename connections. It stores passwords safely with kwallet. You can save/manage sessions very easily using a menu. It supports preinit and postend scripts per connection, typically to start or stop SSH tunnel or VPN connections.