Add-on for the Node Gallery module that creates and maintains default gallery for every user.
The main goal of the module is to make image sorting easy, optional task, and to streamline the uploading process.
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.