There are 2 repositories under admx topic.
Group Policy Template for Schannel
Custom ADMX template focused on hardening Windows 10 systems
Collabora Office / LibreOffice Windows Group Policy Template
YubiKey Smart Card Minidriver Administrative Template (ADMX)
Administrative Template for YubiKey PIV Manager
A tool to generate Intune OMA-URI settings and values from ADMX files
Module to parse Admx Policies Settings from a given PolicyDefinitions folder.
ADMX template for customizing the Windows 11 Start Menu