PayU also known as platnosci.pl
just add to your Gemfile:
gem "active_merchant-payu", :git => 'git://github.com/netguru/active_merchant-payu.git'
and run bundle install
- http://www.payu.pl/
- http://serwis.platnosci.pl/view/admin/ckeditor/uploaded_images/110518135351_dokumentacja_platnosci.pl_2011-05-16.pdf
- http://activemerchant.org/
- https://github.com/Shopify/active_merchant
other resources might be helpful