Ulrichsweb - ProQuest
"Details on periodical titles including journals, magazines, newspapers, and other types of serial publications on all subjects."
InCites (formally Journal Citation Reports) - Thomson Reuters (Web of Science)
"Use InCites (formally Journal Citation Reports) and explore the impact and influence of the world’s leading scholarly journals. Compare and understand the publishing activities, rising stars, and impactful groups influencing the direction of research." Impact factors were developed for comparing journals. Thomson Reuters has exclusive rights to these.
Cabell's Directories of Publishing Opportunities - Cabell Publishing
"Cabell's Directories of Publishing Opportunities contains a wealth of information designed to help researchers and academics match their manuscripts with the scholarly journals which are most likely to publish those manuscripts. The Directories index journals according to different topic areas."
Scholarly Open Access - Critical analysis of scholarly open-access publishing
Beall's lists are somewhat controversial but the websites contain a wealth of information that is part of any journal or publisher investigation. You can at least find clues about the content that will help you make informed decisions.
Beall’s List: Potential, possible, or probable predatory scholarly open-access publishers
(Beall's) List of Standalone Journals: Potential, possible, or probable predatory scholarly open-access journals
Beall’s List of Predatory Open Access Publishers 2015