SEO Tools Centre provides SEO checker services for websites. Here you will find different types of free SEO tools: plagiarism checker, broken links analyzer and much more for free.
iThenticate - Prevent Plagiarism in Published Works
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
PlagScan - The Internet makes plagiarism a bigger problem than ever.
SEO PowerSuite - Get all SEO tools in one pack - download free edition of SEO PowerSuite and get top 10 rankings for your site on Google and other search engines!
PlagiarismSearch - PlagiarismSearch is online service that detects plagiarized content.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.