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The first one is a bootstrap look and feel for ExtJS:
if you want to test it take a look to demo site. The theme is opensource and you can find the source in github.
The second and last one is Clifton theme.
IMHO is a nice theme although it’s not really free. It costs around 320€, but in some professional projects it could be a really low price if you consider the effort to get a professional look and feel . You can try it in demo page.