Is there a way to show an alternative theme for wordpress visitors?

Question

Is there a way for Wordpress to show an alternative theme to a visitor? I have a few Wordpress sites that need to support different device profiles and formats. If there was a way to switch to an alternative theme, say a mobile theme, by passing in a URL parameter like so,

http://www.site.com/blog/?android=1 http://www.site.com/blog/?ipad=1 http://www.site.com/blog/?minimal=1

Answer 1

There are many plugins that should do that. This is just one.

Answer 2

There is a Browser-based Theme Plugin to switch following the User-Agent header. That could be updated to add additional parameters including GET parameters.