Onecomment restricts users to posting only one comment per node.
Perhaps you have a petition content type, which users should only be able to sign once? Onecomment allows you to ensure this. There is real power here when combined with fieldable comments - for example, you could have an event type, where the comment consists of a RSVP status field (like on Facebook: attending / not attending / maybe) - you can use onecomment so that users have a single RSVP status attached to a node.
Important: This module is deprecated. See Commerce Backoffice for a more advanced set of Commerce backend views and related functionality.
This is a feature containing replacement VBO views for the main Drupal Commerce admin screens, including Products, Orders, and Content. This allows you to mass-delete content, orders, and products, etc.
On installation, Commerce VBO Views disables a few default views provided by Commerce; it will re-enable them if it is disabled
Updates and new features:
2011-11-10: The module automatically disables the Commerce default views when it is enabled.
2011-11-07: Added a line item view and a customer profile view and a product display node view. Removed the override of the Content admin and moved it to Admin VBO Views.
2011-10-26: Products can be mass-enabled or disabled, as a new VBO rule was introduced.
You may also be interested in Admin VBO Views which provides general Content and User administrative views.