Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
WSUS Offline Update - Using "WSUS Offline Update" (formerly known as "ct offline update" or "DIY...
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
WHDownloader - A lightweight and easy to use Downloader which allows you to find and apply the latest Microsoft Windows updates....
AlienVault USM (from AT&T Cybersecurity) - AlienVault USM Anywhere delivers powerful threat detection, incident response, and compliance management for cloud, on-premises, and hybrid environments.
Microsoft Update Catalog - Official Microsoft Update Catalog download site.