Yale University's page dedicated to plagiarism and how to prevent it. It provides tips on how to paraphrase, and how to cite various resources like books, articles, internet sources, and other sources.
Defines plagiarism, discusses why you shouldn't plagiarize, and also provides examples of plagiarism. In addition, has few video resources on plagiarism as well.
Grammarly's plagiarism checker checks your paper for plagiarism. It also gives feedback on grammar, punctuation, vocabulary etc. This page is intended for students.
In addition to checking for plagiarism, this tool provides assistance in citing sources for sentences that are not cited in a paper. This website is intended for students.
FREE plagiarism checker. They also offer a "Rewriting Sevice" rewriting up to 75% of your content, edit and proofread your paper to make it plagiarism free and ready to use. (Please note this is a paid service). This website is intended for students.