TclKit is the runtime that makes starkits come alive. It consists of Tcl/Tk [1], IncrTcl [2], MetaKit [3], TclVfs [4], and Zlib [5] in a single self-contained executable.
The TclKit home page has download links for over a dozen platform builds:
https://www.equi4.com/tclkit/It also has details on how to build TclKit yourself - everything in it is OSS [6].
TclKit is an executable file (you may need to uncompress and/or set its "execute" bit to get tclkit to work properly).