Decoda is a free and open source Lua IDE, similar to LuaEdit. Decoda was originally developed for the game Natural Selection II. Since then, it has become open source. Decoda offers syntax highlighting, auto completion, breakpoints, watch windows, and call stack viewing. Unlike other IDEs, Decoda patches itself into any executable running a standard Lua distribution. This makes the IDE usable with applications that have no native support for it.

Like LuaEdit, Decoda is a Windows-only program. You can learn more about Decoda and download it here: https://unknownworlds.com/decoda/.