Dr. Hipp of SQLite fame likes Tcl. The ginormous test suite is in Tcl.
Re:The Birth of Tcl
by mynameismon on Friday April 22, 2022 @05:35AM
(#31119744)
In addition, the entire Fossil front-end (the SCM used for hosting SQLite) is also written in Tcl, which makes it incredibly easy to edit and extend.
[0]http://antirez.com/articoli/tclmisunderstood.html