Because databases vary by subject, this guide can only point toward a few that tend to work for many or most disciplines. Find the databases alphabetically on UNK's website here. Note that you can also narrow the databases by subject and/or use subject research guides to help sift through databases and find those specific to your discipline.
Academic Search Premier
This database provides information on multidisciplinary and interdisciplinary topics. Whether your topic is nailed down or you're still exploring, Academic Search Premier can provide excellent resources.
Academic OneFile
This database doesn't only help researchers find/narrow topics; it also provides resources for those topics.
JSTOR
This database focuses on the arts and sciences. Keep in mind that there is a "Moving Wall Delay" in articles appearing on JSTOR that lasts up to 10 years from article publication to its inclusion on JSTOR; 3 to 5 years is the average delay.