Sociological Abstracts indexes the international literature of sociology and related disciplines in the social and behavioral sciences. Not much full text but a comprehensive way to find out what exists on Soc. topics.
Project MUSE offers full text of articles from 600+ current and historic scholarly journals, and book chapters, from major university presses. This database is good for research on literature and criticism, history, performing arts, cultural studies, education, philosophy, political science, gender studies, and more.