Literary criticism is the interpretation and evaluation of literature. What is the substance and quality of the work? It is simultaneously more broad and more individualistic than literary theory since it applies to any critical engagement with any particular work. For more information on literary criticism, look here.
Literary theory is the collection of concepts that literary analysts can use to examine works of literature. These concepts provide foundational bases from which works can be interpreted. For more information on literary theory and the various forms it can take, look here.
Literary Criticism Online (LCO) contains full text critical literary commentary from several well-known resources: Contemporary Literary Criticism, Twentieth Century Literary Criticism, Nineteenth Century Literature Criticism, Shakespearean Literature Criticism and Short Story Criticism. LCO also links to Gale Literary Index, an index to additional literary compendiums.
The Johns Hopkins Guide to Literary Theory and Criticism by 
The Blackwell Guide to Literary Theory by 
A Dictionary of Literary Terms and Literary Theory by 
Twentieth Century Literary Movements Index by