WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle. 

10 Essential Debugging Tools for C# .NET Development

This is a list of software (SaaS, PaaS, IaaS, etc.) and other offerings that have free tiers for developers. 

7 Windows native tools for developers 

Announcing the new version of Microsoft To Do—we’ve come a long way!  

Transforms code (JS) into graphs (graphviz, mermaid flowchart, ...)

termtosvg is a Unix terminal recorder written in Python that renders your command line sessions as standalone SVG animations

17+ Must Have .NET Developer Tools - The Essential List