i came to know these three websites which are alternative of copyscape.. i hope you guys enjoy them.as they are helpful and when copyscape gives you error of monthly usage..they are best alternatives..
Similar Page Checker - Duplicate content checker
Plagiarism Checker
Check for Plagiarism On the Web For Free - PlagiarismChecker.com
Similar Page Checker - Duplicate content checker
Plagiarism Checker
Check for Plagiarism On the Web For Free - PlagiarismChecker.com