Because it seems to be possible to submit libraries and tools too, I want to submit some libraries I created for the MonoGame community:
Name: MonoGame.Forms
Type: Library
Platforms: Windows, Linux
URL: GitHub - BlizzCrafter/MonoGame.Forms: MonoGame.Forms is the easiest way of integrating a MonoGame render window into your Windows Forms project. It should make your life much easier, when you want to create your own editor environment.
Logos: https://github.com/sqrMin1/MonoGame.Forms/tree/master/Logos
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Name: MonoGame.SplineFlower
Type: Library
Platforms: Windows, DesktopGL
URL: GitHub - BlizzCrafter/MonoGame.SplineFlower: Create wonderful smooth Bézier-, CatMulRom- and Hermite-Splines with Trigger Events for your MonoGame project.
Logos: https://github.com/sqrMin1/MonoGame.SplineFlower/tree/master/Logos
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Thanks 