Field Conditional States

With the Field Conditional State module you can change the state of any supported fields form element depending on the content of other fields. This is done by providing an UI for Drupal's States API. All the changes made to a form by FCS (Field Conditional States) utilize only the States API and therefore are clientside only.

Views Filter Harmonizer

Normally, when a Views field has been assigned both an exposed filter and a contextual filter, then both filters get applied to the View's results set -- always. This is not configurable behaviour. It's hard-coded.

Jammer

The Jammer module hides particular elements from edit forms, similar to the Simplify module. This module is mentioned on the revisioning module/s project page on Drupal.org.

Form Builder

This module is a great way to easily create a form and generate the PHP form structure. Used in the Configuration Builder module.