Interesting article about the "Tcl experience" here: http://yosefk.com/blog/i-cant-believe-im-praising-tcl.html

I love how simple the language is. Quick and easy to learn, small footprint, embeddable. For quite a while I used to prototype simple web services in Tcl, then convert to C for speed. The Tcl versions were so much easier to write, adapt, and debug, and had more features, because in C at some point I thought, meh, don't really need this...