"Open J-Gate is an electronic gateway to global journal literature in open access domain. Launched in 2006, Open J-Gate is the contribution of Informatics (India) Ltd to promote OAI. Open J-Gate provides seamless access to millions of journal articles available online. Open J-Gate is also a database of journal literature, indexed from 3000+ open access journals, with links to full text at Publisher sites."

"website that lists the price per article and the price per citation for about 5,000 academic journals. Using these statistics, we have constructed an index of costliness for each journal in each of several broadly defined disciplinary areas"...created by UCSB and CalTech...see this article http://www.hss.caltech.edu/%7Emcafee/Journal/OpenLetter.pdf