Plenty of hardware manufacturers bundled Windows 1.0 with their products. These releases were often customized to support additional hardware not supported by the retail release. Several machines which were not IBM PC-compatible also ran Windows 1.0. Click on the links below to learn more about each OEM release.
Please note: only releases which are currently available online are listed. Releases which are confirmed to exist, but are not widely available, were excluded. For a complete list, see this post on my blog.