GreenT is a Linux terminal emulator written in C#. Its visibility can be toggled by a hotkey just like the consoles found in games. Additionally, it supports tabs like gnome-terminal. It uses gnome-terminal's settings for its configuration which it updates in real-time when changed in gnome-terminal.
vt52vnc is a VNC viewer which can be used on prehistoric green monochromatic terminals called vdt52s, which are capable of vector graphics. It is functional and nicely displays X on the terminal, but without the routines for dithering, compression, and password support. Its architecture provides a framework to add those features if needed.