IndexTank module for Drupal
http://www.indextank.com

Requirements:
1.- php5-curl module.

Installation instructions:
1.- Sign up at IndexTank.
2.- Download and unzip/untar the last stable version of the IndexTank module for Drupal.
3.- Upload the IndexTank module to <your_drupal_directory>/sites/all/modules your web server.
4.- Enable the IndexTank and Search module at Administer >> Site Building >> Modules.
5.- Configure your IndexTank api url at Administer >> Site Configuration >> IndexTank Settings.
6.- Create your index pushing the 'Index all your documents' button.