Maintained by the state government of Michigan.
Files you download will be either .zip files or self-unpacking .exe files.
The Map Catalog section provides some GIS data for download. Some layers are only available as PDFs.
The City of Ann Arbor provides both interactive maps, static maps (PDFs) and spatial data resources from its Ann Arbor Geographic Information System (AAGIS).
City of Ann Arbor GIS data specifically: http://www.a2gov.org/data/Pages/default.aspx
is available through SAND at the Clark Library - email firstname.lastname@example.org for more information.
Interactive map that lets you look at lots of variables, including foreclosures by zip or census tract