The website of the Institute for Higher Education Policy (IHEP) has a section called Ranking Systems Clearinghouse to "provide a road map of this complex rankings landscape, offering annotated links to these national and international ranking systems and to research about rankings world-wide." [link via Inside Higher Ed].
It has tons of links to university rankings by many different kinds of organizations. For example, take a look at this page for international rankings of MBA and other professional programs.
THE/QS and ARWU rankings appear in this page devoted to international rankings. For national rankings, you might want to check out the pages for the US and India -- the latter seems so incomplete and meager!