Check your texts for plagiarism by comparing the original document with other text files stored locally or on the web or searching through an extensive online database. Use the fingerprinting technology to have a number of relevant chunks extracted from text and compared to the selected files.
The 1.4.2 version of CopySpider is provided as a free download on our website. You can install this free PC software on Windows XP/7/8/10 32-bit. The most popular versions among CopySpider users are 1.1 and 1.0. Our built-in antivirus scanned this download and rated it as virus free. The software lies within Education Tools, more precisely Teaching Tools. This free program was originally designed by CopySpider.
From the developer:
The CopySpider is a freeware tool to test documents under the existence criterion of undue copies of other documents available on the internet.
A document has copies undue when it suits or transcribed passages from other documents without showing compliance with the standard citation references (bibliography).
The CopySpider was designed to be nimble and precise in identifying similar documents available on the internet.
CopySpider has a Professional version with resources focused on productivity evaluation of a large number of documents (batch processing).
You may want to check out more software, such as CrypTool, GPSS World Student Version or G4FON Koch Method Morse Trainer, which might be similar to CopySpider.