Kaminari is great, and it's been around for awhile now. Not sure why this has been posted today, but anyone using Rails that requires pagination in any way would benefit greatly from it's implementation.
Specifically:
"Does not globally pollute Array, Hash, Object or AR::Base."
I switched from will_paginate to kaminari when I made the move from rails 2 to rails 3 and haven't looked back. It's a great library that works as advertised.
Specifically:
"Does not globally pollute Array, Hash, Object or AR::Base."
Which is very polite.