ZeroBrane Studio is a lightweight Lua IDE with code completion, syntax
highlighting, live coding, code analyzer, and debugging support for
Lua 5.1, Lua 5.2, Lua 5.3, LuaJIT, and other Lua engines.

It is simple and instantly usable for beginners yet feature-rich and
extensible for experienced developers. It has a small footprint and is
completely customizable with Lua while still including a full IDE feature
set including a remote debugger.