One can find electronic journals by title here or by doing a title search in the library catalog. In the New Catalog, one can limit to ONLINE content under Access on the left-hand side, and to JOURNAL under Format. Alternatively, one can browse journals more visually and by subject using BrowZine. BrowZine allows one to save favorite titles to a Bookshelf, and to retain selected articles.
Web of Science includes journal articles and some book content for the humanities, social sciences and sciences. Searching WOS takes a bit of practice, but its advantage is the ability to trace citations: how often an article has been cited by others and what references has an article cited. For more information on WOS, see this LibGuide put together by Engineering librarian Willow Dressel.