This is not a comprehensive list, it provides enough tools to immediately help secure your websites and internal networks starting today. Free online service performs a deep analysis of the configuration of any SSL web server on the public Internet. After the scan you are presented with a list of the found vulnerabilities and links to instructions on how to mitigate those vulnerabilities. Free tools include ASafaWeb Security Analyzer for ASP.NET websites and TripWire SecureScan SecureCheq.com for Windows desktops and servers. Microsoft releases an updated version of this tool on the second Tuesday of each month.”]
Source: https://informationsecuritybuzz.com/articles/free-security-tools-for-small-businesses-on-a-budget/