ModelTools tools are avaible for both Windows and popular Linux distributions and for both terminal (shell) and GUI interfaces.
The target computer platform and interface implementation are signalled by the first part of the executable filename.
Model ... These tools work in a Windows GUI environment.
Shell ... These tools target both the Windows and Linux terminal (shell) environments.
Click ... These tools target the Linux GUI environment.
Mono ... These tools assist software and model development in Mono installed on Windows.
I'm calling five Windows GUI tools the essential tools. These tools will receive the most attention in the documentation that follows.
If you understand the use of these five tools, you will also understand the use of tools from the other operating systems and user interfaces, since all of these tools provide the same functionality.