Here I will upload small Blender Addons that are not worthy of their own repository.
Add Lightblocker (Download)
Creates a Lightblocker Object with an material preset from the Light Context Menu.
Add Grass Shrubs (Download)
Creates a collection of customizable grass shrubs for use in particle systems.
Hardify (Download)
Quickly Shades an Object Smooth and turns on Autosmooth + Optional Weighted Normals Modifier. Located in Object Mode → Select Mesh Object → Object Context Menu (Rightclick or W)
Cycles - Eevee-Previewsettings (Download)
When using Cycles, displays the most relevant Eevee settings for the Material Preview in the Viewport Shading Menu, as well as Material preview Settings in the Materials-/ and Node Editor Area.