CrossOver is a polished version of Wine provided by CodeWeavers. CrossOver makes it easier to use Wine and CodeWeavers provides excellent technical support to its users. All purchases of CrossOver are used to directly fund the developers working on Wine. So CrossOver is both a great way to get support in using Wine and to support the Wine Project.
CodeWeavers provides fully functional trial versions of CrossOver.
This endorsement is the primary recognition that CodeWeavers has requested in exchange for hosting the Wine web site.