MLA International Bibliography. Indexes articles, books, and dissertations on modern literature, languages, folklore, and linguistics. Coverage goes back to 1926.
Humanities International Complete. Indexes and abstracts some 1,900 periodical titles with some coverage as far back as 1925. Also indexes books, essays, reviews, and original creative work including fiction and poems.
JSTOR. Fully searchable full-text of nearly 1,000 scholarly journals. JSTOR provides back files to the first issue of a journal, but stops 3 to 5 years before the current publication year. Covers all disciplines.
Electronic Journal Center (EJC). Searchable, full-text issues of journals from a number of major publishers. More than 7,000 journals are available.