Journal rankings can be very controversial and each resource has pros and cons to their use. CiteScore and SCImago are the two most heavily used tools. For publications not covered by these tools, you might want to check out Google Scholar Metrics.
A new, free tool for evaluating journals. Data is produced for journals, conference proceedings, and book series covered by Scopus. NOTE: CiteScore is produced by Elsevier, who publishes many high-impact journals and has the potential ability to insert bias in the results.
This is a free website. Includes SNIP Indicators information. SNIP is a European ranking that attempts to address the problems of varying citation rates among disciplines and the lack of statistics to indicate levels of significant differences. Journals included are those covered by Scopus.
This tool can be used to see the most heavily cited articles in a specific publication (according to Google Scholar) and to see the median times cited for their articles. This could be helpful for finding median article citation rates for newer journals, proceedings, or other publications that are not covered by Impact Factors.
This portal includes the journals and country scientific indicators developed from the information contained in the Scopus® database. These indicators could be used to assess and analyze scientific domains, similar to Google PageRank.
Eigenfactor ranks journals much as Google ranks websites. It uses data from the Journal Citation Reports (JCR) database as part of creating the Eigenfactor score. It corrects for differences across disciplines and journals in the propensity to cite other papers. This site provides rankings for all the JCR journals as well as 100,000 references cited by those journals.
The Journal Quality List comprises academic journals in the following broad areas: Economics, Finance, Accounting, Management, and Marketing. It is a collation of journal rankings from a variety of sources.
Includes high-impact journal lists and U.S. university rankings. Data based on SCImago. Originally only covered biomedical sciences, but has expanded to cover a wide range of sciences and social sciences areas.