Continuing the discussion from Explore Gravity Forms (awesome list):
GravityPerks is a meta-add-on-plugin for Gravity Forms. It works in a similar way as the Gravity Forms add-on system, where functionality is added by activating sub-plugins. In the case of GravityPerks, these turn out to be clever features and additions that really make GravityForms useful, and many times could be handled by adding a custom function to your project.
Notably, the team behind GravityWiz run an active blog where they tend to “dogfood” future “perks”, sharing snippets of code, leading active discussions, and then wrap up the new functionality as a nice add-on.
Depends on Gravity Forms and WordPress.