Here are some 11 resources & websites to download Vector, Icon and PSD files & stock graphics. All of them are free & you can use them without restrictions.

Photopea is a web tool that lets you create, open, edit Photoshop & GIMP image files using its free online photo editor, using Filters & other features.

Krita is a FREE and open source painting tool designed for concept artists, illustrators, matte and texture artists, and the VFX industry.