JSTOR - This electronic archive of core academic journals contains about 450 literature and language journals. Full-text coverage for most titles is for older volumes only (missing latest 3-7 years).
Project Muse - This collection of electronic journals, published by Johns Hopkins University Press, includes current issues and some back volumes (archival coverage varies by title) for about 230 literature journals. Though the UNO library does not subscribe to any of the journals in this database, many of the titles have been made openly available, and you can always use Interlibrary Loan to obtain an article that you do not have access to.