DOAJ- It used to be a good database in the past. But now it is under the influence of Traditional publishers and it cannot claim that it is promoting open access journals. Check DOAJ web page for its supporters. These big publishers are trying to destroy the trace of Open access model for their survival.
Scopus- The indexing database is maintained by a leading Publisher. The selection process is questionable and the researchers can't expect a publisher to include other publisher's journals. The database contains lot of errors.
EI- Do you expect a publisher to include other publishers journals in their list. If you believe so, you are wrong.
DBLP - Full of error
INSPEC- Not a great one and their coverage is not wide. The database is not up to date and their selection process is questionable.
Index of Information Systems Journals
This publication is edited by John Lamp. Published by Deakin University, Australia
Impact Factor of the journal
Thomson Reuters Impact factor is widely accepted and respected in the research community. All other Impact factors are fake such as SCImago and 100s of others.