Plagiarism Checker X - We strive to provide the most effective, secure and user-friendly plagiarism checking tool that champions originality: a privacy focused, effective and user-friendly plagiarism detector that merges innovative technology with user needs.
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
iThenticate - Prevent Plagiarism in Published Works
Grammarly - Clear, effective, mistake-free writing everywhere you type.
SCRiBBR Plagiarism Check - This plagiarism check uses the best of both worlds.
WhiteSmoke - WhiteSmoke software products for writing and language. WhiteSmoke is a grammar checker, spell checker, style checker and more - in a single package. Also featuring translation software and English video courses.