n3t Language Domains
n3t Language Domains allows to assign language per domain. This means you can have for example www.example.com with english content, www.example.cz with czech content and www.example.de with german content.
The plugin generates correct SEF or nonSEF links through whole site, and choose correct language based on current domain. Also additional parameters (like Virtuemart currency for example) could be defined for specific domain.