Comet (formerly SigmaScript) is a development environment for the Lua scripting language for Android with built-in Lua scripting engine. It is mainly dedicated to numerical computing and data analysis. Features: Built-in Lua scripting engine, numerical and data analysis modules, syntax highlighting, included Lua samples and code templates, output area, save/open to/from internal or external card, etc. The main goal of Comet is to provide an editor and scripting engine for Lua on Android, parti