These are the sites and online tools that I’ve been using and have in my bookmarks.
Microsoft 365
M365 Maps
Great resourced for figuring out what Microsoft products are bundles with the licenses.
Microsoft Remote Connectivity Analyzer
Software Downloads
WinWorld: Download Microsoft Software
Legacy Update: Get back online, activate, and install updates on your legacy Windows PC
Alternative Software
Looking for software that like something you know but maybe a free or open-source alternative?
Open Source Alternatives to Proprietary Software
DNS & Networking
Global DNS Propagation Checker