I used to like TCL a lot.
I wrote a custom CMS and, in a fit on NIH, a light weight web server in it (lots of people have done the latter, and there is a long list of our efforts on the TCL wiki).
I also used a lot of simple TCL scripts - one called a latex to html converter and did a bit of processing of the output to generate a static site.
The lack of libraries or a web framework eventually drove me to Python.
TCL used to be a major scripting language, now its obscure. Its a pity in some as it is readable, flexible, has very fast regular expressions, and a helpful community.