Research Experts - Research Experts app helps you in getting plagiarism monitoring, checking, and duplication removal services to get the text without any plagiarism.

LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.

Plagiarism Checker by C.A Apps - Plagiarism Checker is an educational app by C.A Apps comes up with features to allow users to instantly check their articles for plagiarism.

Grammarly - Clear, effective, mistake-free writing everywhere you type.

Turnitin - Turnitin is preferred by educational institutions around the world for preventing plagiarism. Instructors at all levels of education can request that students use the service to submit papers, and Turnitin checks those papers for plagiarism.

Editsaurus - Highlights potential pitfalls in your writing to encourage good habits.