Simple Terminal is rxvt-unicode Pyqt5 terminal implementation with less than 20 lines of code.
Requires pyqt5 and python3 installed. Packages vary upon distributions.
Requires rxvt-unicode to be installed. Can also be named as urxvt depending on a distribution.
Functionalities include the standard rxvt-unicode functionalities. Customizations are done with Xresources file, which is supplied with the project.
For more information and download, see Simple Terminal Github project page.