As of 2016, free plagiarism detector programs include Grammarly, Plagscan, Whitesmoke, Article Checker and DupliChecker. Other plagiarism detector programs include PlagiarismCheck, SmallSEOtools, Plagium, Plagiarism Checker and Paperrater.
Plagiarism checkers are becoming a widely used resource as protection against the scores of writers and bloggers who copy other people’s writing without giving due credit to the real author. Many free checkers offer the simplicity of copy and paste or upload functionality that checks and compares written content against numerous Web pages to produce a final report of potential or actual plagiarism. Plagiarism detectors also help to improve vocabulary; proofread, uncover and correct typographical and grammatical errors; and highlight potential content errors.