ctcl is basically a tclkitsh or tclsh replacement for Windows. It is a console application with twapi and sqlite bound in. The biggest difference though from tclsh or tclkitsh is in its accepting scripts from the command line using standard Tcl syntax. Example are below:
Without any arguments, ctcl behaves like tclsh.
If the first argument is a script file, ctcl behaves like tclsh.
Otherwise, ctcl treats the entire line as a Tcl script.