The Association of Religion Data Archives -- ARDA provides various forms of data related to religion. The organization is maintained and collects data from various religion scholars and research centers.
Internet Guide to Religion -- This guide provides a selective, annotated guide to various websites on religion. The American Theological Library Association hosts and maintains it as of 2018.
The Pew Forum on Religion & Public Life -- The Pew Forum on Religion & Public Life, launched in 2001, seeks to promote a deeper understanding of issues at the intersection of religion and public affairs. The website includes reports, surveys, datasets and other materials.
Virtual Religion Index at Rutgers University -- This is an extensive listing of organized websites related to many aspects of religion. Maintained by the Rutgers Religion Department.