There are tons of great online IT resources. Here are some of my favorites:
A no-hassle command line reference site that covers CMD, Bash, PowerShell, OS X, and more.
TechNet Sysinternals Utilities
TechNet’s Sysinternals includes tons of useful Windows utlilties to help you manage and troubleshoot Windows computers.
A unique collection of small and useful freeware utilities, all of them developed by Nir Sofer.
A collection of small and useful freeware utilities all developed by SoftwareOK.
Windows Ten Forums
A great set of forums that covers tons of Windows 10 tips and tricks.
Windows Seven Forums
A great set of forums that covers tons of Windows 7 tips and tricks.
An online community that focuses on cyber security. Offers great forums, downloadable tools, tutorials, and virus removal guides.
An online community for IT professionals to collaborate and share solutions.
IT Support Guides
A collection of tutorials for a variety of software and topics.