A little language that can.

Category Link Notes
Rav i a dialect of Lua with limited optional static typing
IDE ZeroBrane for Windows, Mac OSX, and Linux
Automation Hammerspoon a macOS desktop automation tool that can be used for window management
Compilers gopher-lua A Lua VM and compiler written in Go
Embedding LuaCore A framework for Cocoa embedding.
LISP fennel a LISP that compiles to Lua
Urn another, more sophisticated LISP that compiles to Lua
Libraries feedparser An RSS feed parser.
Torch7 A scientific toolkit
IUP a GUI toolkit
Grid SDK a game engine for Lua
lua-git a Lua library that implements some git functionality
ltui a terminal UI kit
Multiprocessing LuaLanes A nice alternative to coroutines
Runtime LuaJIT the official JIT
Luvit A wonderful variant of LuaJIT using libev
moonshine A lightweight Lua VM for the browser
Moon# An interpreter written in C#
luje A Java VM written in Lua
luajit-libuv An FFI binding to libuv that seems nicer than than luvit
Tools Hammerspoon A Lua-powered scripting engine for Mac OS X
luastatic pack and build static executables
luapak pack and build static executables from Lua rocks
Web frameworks Lapis A web framework that runs inside the LuaJIT runtime hosted inside nginx
Mercury A tiny Sinatra-like framework