RIMMF stands for "RDA in Many Metadata Formats". It is a tool for creating and editing data compliant with RDA.

The latest full version is RIMMF3.

A beta version of RIMMF4 implements changes from the RDA Toolkit Restructure and Redesign (3R) Project.

RIMMF is used to create and augment r-balls, and is the main data entry tool for a Jane-athon.