The Google Docs Citations Tool is easy to use and accurate. It provides citations (both in-text and end-of-text) in MLA, APA, and Chicago formatting styles.
This MLA citation generator is easy to use and has a Google extension. It also will check your grammar for free. Other formats and plagiarism checking requires an account.
This citation generator is for MLA, APA, Chicago, and other citation styles. You can download your reference list and it has a Google extension.
This is the most comprehensive database of formatting guidelines for both MLA and APA formatting available for free on the web.