ZeroBrane Studio is a lightweight IDE for Lua written in Lua. The most recent version adds experimental live coding in Lua (demo here: http://notebook.kulchenko.com/zerobrane/live-coding-in-lua-bret-victor-style) and integration with luainspect/metalua to do static analysis. The code is released under MIT license and is available on github (https://github.com/pkulchenko/ZeroBraneStudio). Paul.