InstaMat is a pie-menu addon (Shift + F) with 3 main goals: Making it faster, easier and more versatile of:
1) Editing materials you have in your scene
2) Managing materials you either have in your scene, or use often
3) Creating so called ‘Standard Materials’ in the form of ‘InstaMats’ like metal, fabric, wood, glass and plastic. Versatility, detail and performance oriented materials, that can be created with 1 click, that rival the looks of your best PBR materials.
Update 1.10: 2 New InstaMats:
Update 1.10 added 2 new InstaMats: Eevee_Glass and Emission. A new popup node editor and 2.91 support were also added