Not sure where to begin evaluating potentially predatory publishing opportunities?
Think. Check. Submit. provides a framework and checklist to critically evaluate journals. You can find this tool at: https://thinkchecksubmit.org/
Cabell's Scholarly Analytics is an evaluation source for open access journals. Journals featured on the Whitelist have passed Cabell's evaluation criteria, while those on the Blacklist have been flagged for predatory practices. Complete evaluation criteria for each journal, as well as publication metrics, are available for each title.
Journals Online (INASP)
African Journals Online (AJOL)