Overview

OpenDLP is a free and open source, agent-based, centrally-managed, massively distributable data loss prevention tool released under the GPL. Given appropriate Windows domain credentials, OpenDLP can simultaneously identify sensitive data at rest on hundreds or thousands of Microsoft Windows systems from a centralized web application. OpenDLP has two components: a web application and an agent.
Web Application

Automatically deploy and start agents over Netbios/SMB
When done, automatically stop, uninstall, and delete agents over Netbios/SMB
Pause, resume, and forcefully uninstall agents in an entire scan or on individual systems
Concurrently and securely receive results from hundreds or thousands of deployed agents over two-way-trusted SSL connection
Create Perl-compatible regular expressions (PCREs) for finding sensitive data at rest
Create reusable profiles for scans that include whitelisting or blacklisting directories and file extensions
Review findings and identify false positives
Export results as XML
Written in Perl with MySQL backend

Agent

Runs on Windows 2000 and later systems
Written in C with no .NET Framework requirements
Runs as a Windows Service at low priority so users do not see or feel it
Resumes automatically upon system reboot with no user interaction
Securely transmit results to web application at user-defined intervals over two-way-trusted SSL connection
Uses PCREs to identify sensitive data inside files
Performs additional checks on potential credit card numbers to reduce false positives
Can read inside ZIP files, including Office 2007 and OpenOffice files