Populate Anything is a Gravity Wiz perk. This perk allows you to use posts, users, taxonomies, terms, entries, and databases to dynamically filter and populate fields. Filtering is based on the values entered/selected in other fields. This allows you to conditionally populate fields with dynamic data as the user interacts with the form.
Populate Anything comes with support for Live Merge Tags, allowing display of dynamic, filterable data in field labels, descriptions, and content (example on the Gravity Wiz website).
See other Perks by Gravity Wiz.