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MISP (core software) - Open Source Threat Intelligence and Sharing Platform (formely known as Malware Information Sharing Platform)
Feed a list of IP addresses to an app, have it generate a world map of associated countries.
a simple tool to detect potential security threat in php code
Verifies MD5 checksums of WordPress core files, sends e-mail to the mail address of your admin user warning in case of threat. Just activate it and you are done.