Awesome
++ getRelated
++ Developer: Mark Hamstra
++ License: GPL GNU v2
getRelated is a snippet for MODX Revolution that automatically finds related pages based on fields you specify.
It has been developed by Mark Hamstra for Vierkante Meter.
Forum Discussion: http://forums.modx.com/thread/71009/getrelated-automatically-listing-related-resources-for-revolution
Documentation: http://rtfm.modx.com/display/ADDON/getRelated
Bugs & Features: https://github.com/Mark-H/getRelated/issues
Commercial Support: hello@markhamstra.com