Society of American Archivists: The Homepage of the Society of American Archivists, our parent organization. Hopefully if you’re here you know about this site already.
ARMA International: The major international records management association, with links to regional chapters, educational resources, standards, and much more.
Association for Information and Image Management (AIIM): Another major information management organization, focused on technology solutions and content management in addition to records management. Lots of good professional development opportunities here.
Information Governance Initiative (IGI): Formed in 2014, the Information Governance Initiative was is focused on research and advocacy in the space of information governance. Check out their website for peer-to-peer networking, research, and guidance.
You can also find a detailed bibliography that the RMS hosts in Zotero at https://www.zotero.org/groups/404345/saa_records_management_section/items.