If you want to develop mobile apps with Drupal as backend you might want to check out this SDK client video comparing Drupalgap and the ADG app (using this library).
About www.app-development.guide: slides and (premium) tutorials
TitaniumDrupalAdapter is a submodule of this repo. clone with --recursive to get the submodule code.
git clone git@github.com:jbeuckm/Ti-Drupal-Test-App.git --recursive
Rename app/lib/drupal/config.js.example
to app/lib/drupal/config.js
and enter the url of your Drupal 7 install and your Services 3.4+ REST/JSON endpoint.
The included spec is intended to be run with TiShadow + Jasmine.