World wide map extracts are available at extract.bbbike.org provided by Wolfram Schneider
A customizable area can be chosen
Maximum file size is limited to 512 MB for free (Pro users can download more, which requires a monthly subscription fee). Work around: maps can be combined with the OSM combiner tool
Output formats are in Ascii (latin1) or Unicode (UTF-8)*.
* UTF-8 is not supported by older devices and some Edge series so latin1 is recommended
Weekly updates from the OSM database
Extracts are in gmapsupp.img format so only dedicated to the GPS units (no Basecamp version provided). To view the maps in Basecamp, connect your GPS device or a micro Sd card to your desktop, or use a virtual drive.
Contour layers (40m) are also available separately
Links to other Garmin OSM maps
OSM Freizeitkarte - Maps of the Freizeitkarte project are intended for users of the Garmin BaseCamp (OS X, Windows) application and owners of Garmin devices.