Below are some suggested library databases related to different disciplines. There are many more! Contact me for more ideas, or browse other databases from library homepage's Databases section -- click on the dropdown box labeled SUBJECTS.
Language & Linguistics
These databases may include academic journal articles as well as government and NGO reports (often called "gray literature").
Literature reviews can be found in almost all databases -- some databases even have a limit you can use to search only for them. Also, searching the ANNUAL REVIEWS database below is an excellent place to search. ANNUAL REVIEWS is a publisher that only publishes invited literature reviews by top scholars.