Sites listed here are general in focus but contain information in the linguistics field. Language specific websites are listed under individual languages.
Sites listed here are valuable for research in any subject area. Language specific websites are listed under the tabs for each language.
Google Books - On Google Books, you can read books and magazines, download them, cite them, and translate them. Not all books are provided in their entirety.
Google Scholar - Google Scholar is a freely accessible web search engine that indexes scholarly literature across a wide spectrum of disciplines.
This video describes methods you can use to judge the credibility of information that you find on the internet.