Scribbr - Scribbr is an online proofreading and editing service used for the academic activities of the students.
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.
MyBib - A new FREE citation generator.
Unicheck - The plagiarism checker Unplag scans across the internet, repositories, open sources content and databases. It delivers real-time results and has no cached data.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
PlagScan - The Internet makes plagiarism a bigger problem than ever.