CMake... ccmake or cmake?

ccmake is the curses (terminal handling library) interface to CMake.

cmake is the CLI (Command Line Interface)

Both are interactive dialogues for CMake (as opposed to primarily-command-line tools).

Quoting from the documentation for ccmake:

The [ccmake] executable is the CMake curses interface. Project configuration settings may be specified interactively through this GUI. Brief instructions are provided at the bottom of the terminal when the program is running.

Quoting from DLRdave's answer to a question about running CMakeSetup:

CMakeSetup is an older program that no longer builds with the most recent releases of CMake. Use "cmake-gui" instead of "CMakeSetup"...

Quoting from the documentation for cmake-gui:

The cmake-gui executable is the CMake GUI. Project configuration settings may be specified interactively. Brief instructions are provided at the bottom of the window when the program is running.