Mk4tcl is the Tcl interface to Metakit. It can be built either as dynamic extension for use with any standard Tcl 8 installation, or linked into an application statically. The latter approach is used in Tclkit to add Metakit database capabilities to Tcl/Tk without installing any software.
The Mk4tcl homepage is at:
https://www.equi4.com/metakit/tcl.html
See also the How to get started with Mk4py and Mk4tcl page.