Open Access Impact Ranking Systems:
1. SCImago Journal & Country Rank
Contains “journals and scientific indicators developed from the information contained in the Scopus database (Elsevier B.V.)” See the Understand Charts and Tables section of the Help.
2. Eigenfactor: Ranking and Mapping Scientific Knowledge
“A non-commercial academic research project sponsored by the Bergstrom Lab in the Department of Biology at the University of Washington.” The most recent impact factors are 2013. See the FAQ section for information on the ranking: http://www.eigenfactor.org/faq.php .
3. Google Scholar Metrics
"Scholar Metrics summarize recent citations to many publications, to help authors as they consider where to publish their new research." (See description for metric details.)
4. Publisher/journal web site may also list impact factor or other journal metrics. For example, see the Journal of the American Chemical Society.
For further information, see:
Haustein, S. (2012). Knowledge and Information: Multidimensional Journal Evaluation : Analyzing Scientific Periodicals beyond the Impact Factor. Retrieved from http://www.ebrary.com
(Permanent link to "How do I determine a journal's impact factor/other journal metrics?")