Sometimes we need to find out what other opinions are out there that our different from our own. Here are some sites that can help us.
CQ Researcher: Full-length articles include an overview, historical background, chronology, pro/con feature, plus resources for additional research.
Credo Reference: Creates a concept map on a range of subject-specific titles covering everything from art to accountancy and literature to law.
Scite- scite is NOT a library database. You can use it to some degree without paying. It's strength is discovering and evaluating scientific articles via Smart Citations. Smart Citations allow users to see how a publication has been cited by providing the context of the citation and a classification describing whether it provides supporting or contrasting evidence for the cited claim.
SAGE Research Methods: is the ultimate methods library with more than 1000 books, reference works, journal articles, and instructional videos by world-leading academics from across the social sciences, including the largest collection of qualitative methods books available online.