Before Lua got popular, Tcl was the only sane option to add scripting to a project. The interpreter was trivial to embed and modify (for instance I created my o

Before Lua got popular, Tcl was the only sane option to add scripting to a project. The interpreter was trivial to embed and modify (for instance I created my own stripped down "minitcl" library which compiled to around 20 to 30 KBytes).