Komodo provides a solid IDE for Drupal work that constantly surprises me with hidden tidbits of usefulness. One of the latest tricks I've been using provides the ability to perform quick lookups against http://api.drupal.org/ with a simple keyboard command. By default, this functionality is set to lookup functions against php, but because php help presents itself in tooltips I find it useful to redirect searches for Drupal.
In order to accomplish this simply open Komodo's preferences and navigate to Language Help ... Select the php language and set the search string to open http://api.drupal.org/api/function/%W/6.
Now you can type something like hook_nodeapi, highlight the word and press the keyboard sequence in the image above for your platform ... piece of cake and extremely useful.