Lua is used in many products and projects around the world. Here are some highlights. A different selection is shown every day.
Players of World of Warcraft use Lua to customize the game interface. | Snort, a popular network intrusion prevention and detection system, is scriptable with Lua. | The widely used VLC media player is scriptable in Lua. | Wikipedia uses Lua as its template scripting language. Read the announcement. |
Wireshark, a popular network protocol analyzer, is scriptable with Lua. | GitHub uses Lua scripts in the infrastructure of GitHub Pages, its static site hosting service. | "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) | The widely popular game Angry Birds is mostly written in Lua. See a talk by Jaakko Lisalo at the Game Design Expo 2011. |