ZoomIt - Annotation Tool
Simple, but great Annotation Tool
ZoomIt is a simple screen zoom and annotation tool for Windows. Except for the settings, there is no user interface, everything is run with customizable hotkeys. It is possible to zoom the screen area and move around while zoomed. Also, it is possible to draw or write on frozen screen.
Dapr - The Distributed Application Runtime
Microsoft's Sidecar for Distributed Applications
Dapr is a free and open-source sub-system for distributed applications that simplifies development by offloading Service Invocation, Publish and Subscribe, Secret Management, Input/Output Bindings, State Management, and Virtual Actors as a sidecar pattern.
Book: Dapr for .NET Developers
Microsoft's Introduction to Dapr
Dapr for .NET Developers is a free Dapr book. You can download it from Microsoft Docs Site.