Adoption Research in the United States
Ancestral Quest
Ancestry.com (Library Edition available at FHC)
Creativegene
Cyndi’s List
FamilySearch.org
FamilySearch Research Wiki
Google.com
Google Maps
Google Translate
Historical Society of Michigan (Links to Online Research Collections)
International Tracing Service
Internet Polish Genealogical Source
Jewish Genealogy Research (FamilySearch)
Jewish Records in the FamilySearch Catalog
Macomb County Death Records System
Many Roads
MEL – Michigan Electronic Library – HeritageQuest
Michigan Eastern District Naturalization Index 1907-1995
Michigan Genealogy
Michiganology/SeekingMichigan/Michigan Death Records — 1897-1952 (not all images are available)
MyHeritage.com (Library Edition available at FHC)
National Archives – Great Lakes Region
Obitsarchive.com
Passenger Lists
Polish Art Center 
Polish Pioneers of Calumet, MI
Polish Roots
Polish Surnames
Roggenbuck_Jonny
RootsTech
SeekingMichigan.org (Now Michiganology.org)
Stevemorse.org
United States Genealogy Online
United States Holocaust Memorial Museum
Whitepages.com
WikiTree
Work Projects Administration (WPA)

CATHOLIC  CHURCHES and SCHOOLS

Archdiocese of Detroit
Diocese of Toledo
St. Casimir – Detroit, MI
Sweetest Heart of Mary – Detroit, MI
The Official Catholic Directory – 1921 (with city and priest indices)

LIBRARIES and ARCHIVES

Archives of Michigan
Bentley Historical Library
Bloomfield Hills Family History Center
Burton Historical Collection / Catholic Church Microfilmed Records (BMD) at Burton Historical Collection — Detroit, MI  (searchable PDF)
Clarke Historical Library
Clinton-Macomb Public Library
Harbor Beach, MI Area District Library
Kalamazoo Public Library
Library of Congress – Ask a Librarian
Library of Michigan
Loutit District Library
The Making of Modern Michigan — Digitizing Michigan’s Hidden Past
Michigan Biographical Index (James N. Jackson)
Michigan County Histories and Atlases
Michigan Memories — MichiganDigital Library Portal
Michigan Tech — University Archives and Historical Collections
Public Libraries in the United States
Public Libraries of Saginaw
Rural Property Inventories  — (WPA)
Sandusky, MI District Library
Wayne State University Libraries — Virtual Motor City Digital Collection