This are autocomplete Libraries for both Titanium Mobile and Titanium Desktop. Download them and use them in your favorite Editor. For an example how to use them for autocompletion in the great Editors PHPStorm / WebStorm please read my blogpost under http://blog.parastudios.de/?p=435
jakubgg/Titanium-Autocomplete
JavaScript Autocomplete Libraries for Titanium Desktop and Titanium Mobile
JavaScript