A set of icons for file formats (PNG, 128x128 or 256x256) in a distribution license

Question

Icons

Recommend some good set of icon images for files, otherwise the whole Internet is in some strange 3D crafts that are not even recognized by the average user (recognizability is the main factor).

It is imperative that the license under which they are published allows distribution in their products and in products derived from their product. It seems to be possible under the (L)GPL, CC-BY-SA and CC-BY-NC.

Answer 1

Beauty and recognizability are rather subjective criteria... :/
Look at the collections on Iconizer , maybe you'll like something.

Answer 2

www.icongalore.com/ the guys from there make beautiful things. There is also www.icondemon.com - there is also a fairly wide selection.

Answer 3

Did you try to use thematic resources? For example, on the same IconFinder there is a filter by size and license.