Aldaviva 

Rate-limit your actions and funcs by throttling and debouncing them. Retry when an exception is thrown.

Convert and format data size units in .NET (bits, bytes, kilobits, kilobytes, and others).

Trigger, acknowledge, and resolve Alerts and create Changes using the PagerDuty Events API V2.

Enable native Windows dark mode for your WPF and Windows Forms title bars.

Declarative automatic state management in .NET with no boilerplate. Never deal with INotifyPropertyChanged again.

Fix egregiously broken or missing functionality in .NET libraries. Inspired by underscore, Apache Commons, Spring, Guava, jQuery, Prototype, Dojo, and mootools.

A collection of .NET components that wrap PInvoke calls to access native API by managed code.

Fix egregiously broken or missing functionality in System.Net.Http.HttpClient.

Disable writing UTF-8 byte order marks (BOMs)

Control TP-Link Kasa smart outlets/plugs

Read and write VisualElementsManifest XML files that define styles for programs' Start tiles in Windows ≥ 8.

Fix egregiously broken or missing functionality in Microsoft.Extensions.Hosting dependency injection.

Gandi LiveDNS API client that can create, read, update, and delete DNS records

Bring windows to the foreground

C# xAPI for Cisco collaboration endpoints

Send and receive events with a Behringer X-Touch Extender DAW MIDI control surface over USB.

Fix egregiously broken or missing functionality in .NET libraries that integrate with Windows APIs.

Common library class to receive updates from a USB HID and reconnect automatically when disconnected

Receive events and control the light on a Griffin PowerMate USB device

Receive notifications when the .NET Runtime running your process gets upgraded to a new version, so you can restart your process and avoid crashing later.