Tool command Language,an interpreted script language from
Sun Microsystems.

Tcl (Tool Command Language) is a very powerful but easy to
learn dynamic programming language, suitable for a very wide
range of uses, including web and desktop applications,
networking, administration, testing and many more. Open
source and business-friendly, Tcl is a mature yet evolving
language that is truly cross platform(windos,all flavors of
linux,macintosh), easily deployed and highly extensible.

Developer :Ousterhout
Current Version : 8.5

Regards,
Rajkumar