Wikipedia
CodeWeavers is a company that sells a proprietary version of Wine called CrossOver for running Windows applications on Mac OS X and Linux. The company was founded in 1996 as a consultancy, eventually moving entirely over to Wine development and support. The CrossOver version of Wine is regularly refreshed with the latest free Wine patches; likewise, patches from the company are sent back to the Wine project almost immediately. CodeWeavers is a major contributor to the Wine project, a free software / open-source software project that helps Windows applications run on different x86-based operating systems, hosts the project's website, and employs the project's maintainer, Alexandre Julliard, as their CTO.
The company originally focused on making the Microsoft Office suite available on Linux. When Apple switched to Intel processors in 2006 CodeWeavers was able to create CrossOver Mac and bring Wine to the Mac OS. Other major supported applications include the financial software Quicken and the Steam game client.
CodeWeaver's products include CrossOver Mac and CrossOver Linux. Previous product versions included Pro, Standard, Games, and Server. CrossOver Games was introduced in March 2008 and was intended to allow gaming-related patches from Wine to be incorporated into CrossOver much faster. The CrossOver Pro product line focused on stability and in-depth testing with supported productivity software and had a slower release cycle. In 2012 all versions have had their functionality merged into the primary CrossOver Mac and CrossOver Linux products.
CodeWeavers also provides porting and consulting services around Wine and other open-source software projects. Google has paid CodeWeavers to improve support for Adobe Photoshop and add functionality to Wine.
CodeWeavers is a founding member of the Desktop Linux Consortium.