TCL designed at Sun, pushed on the Web early days with application servers like AOL Server and Revit (or something similar have forgotten the name).

Perl was introduced in UNIX since the early days and was the tool to use when sed and awk scripts got too complicated.

Ruby was made famous thanks to Rails, and gets very little use outside Rails.

Lua, used as scripting language in a couple of game engines, made famous via World of Warcraft.