Low-level Utilities
HelgeKlein.com

Great tools from Helge like SetAcl, DelProf2 and the uberagent for Splunk.


WinDirStat

Find those lost hidden huge files you want to delete.


Rufus

Create bootable USB drives the easy way.


Networking
Fiddler

Tool for debugging http(s) traffic.

 

InSSIDer

Best WiFi scanner.

 

Ubiquiti Unify

Very cool software defined networking.

 

Clumsy

Simulate worse network conditions.

Windows
Standard Windows functionality classified as ‘hidden gems’.

Problem Steps Recorder

Great tool for documenting problems, installations and configurations.

Internet
Archive.org WayBackMachine

How did the Microsoft web site look back in 1996?


ZamZar

Online file conversion.


Kahoot!

Create fun learning games.


Graphics
IcoFX.ro

Not free, but the best icon editor there is.

Paint.NET

The Paint program Microsoft forgot. Almost complete PhotoShop functionality and free.

Remote Display Analyzer

Show different ICA display modes live!

GPU-Z

See all information about your GPU

SysAdmin tools

Must-have tools for the modern system administrator.
 

Hiren's BootCD

System Administrator tools to the rescue...


Remote Desktop Manager

Not free, but great replacement from Devolutions for the RDCMan tool.


SysInternals.com

Must-have tools from Mark Russinovich and Bryce Cogswell.


Printing
CutePDF
Print to PDF file.
Programming
NimbleText

Regular Expressions made easy. period.

 

postman

 

REST/API programming....

 

Swagger

 

REST/API framework....

 

Rohitab

 

REST/API monitor

 

Other
dnnsoftware.com

Content Management Software for Microsoft platforms. This site is built with it.

2300+ MS-DOS games

Remember those good old times...
https://archive.org/details/softwarelibrary_msdos_games/v2