Lua Showcase

Lua is used in many products and projects around the world. Here are some highlights. A different selection is shown every day.

Wikipedia VLC LuaTeX GitHub
Wikipedia uses Lua as its template scripting language. Read the announcement. The widely used VLC media player is scriptable in Lua. LuaTeX, the engine behind most modern installations of TeX, uses Lua as its embedded scripting language. GitHub uses Lua scripts in the infrastructure of GitHub Pages, its static site hosting service.
Grim Fandango Neovim Volvo LÖVE
"Grim Fandango was the first game that shows Lua could not only be used to make a good game, but that it could be used to make some of the best games ever." (cited here; see also this) Neovim is a popular hyperextensible Vim-based text editor that supports Lua plugins. Volvo cars like the V40 Cross Country embed Lua in their combined instrument panel. LÖVE is a free framework for making 2D games in Lua.