Free resources for artists

Free real photos, images (you should check individually on every image there for copyright info):

1. Unsplash.com
2. https://www.pexels.com
3. https://pixabay.com

Free resources for vector, svg and illustrations:

1. freesvg.org,
2. openclipart.org

Artworks, wallpapers:

1. HQ wallpapers for download: https://www.wallpaperflare.com

Custom palettes for export/import in png or photoshop.

1. https://lospec.com/palette-list
2. https://www.escapemotions.com/products/rebelle/colorsets.php

Color palette generators (from images) and color info, and more:

1. https://icolorpalette.com
2. Many color tools and more: https://color.adobe.com/create/color-wheel

Background and cover generator

1. Figen is a free online post cover and background generator tool – https://figen.cc
2. Photopea – free online image editor, can work with PSD, export to SVG : https://www.photopea.com
3. Not fully free (needs registration), but can be useful for covers, screenshot mockups, etc. : https://www.brandbird.app/studio
4. Pixelate any image or part of it, also many more tools: https://onlineimagetools.com/pixelate-image

Public Domain Resources for Physically Based Rendering https://ambientcg.com

3D Characters and animations https://www.mixamo.com/#/?page=1&type=Character

Meshroom, free, open-source 3D Reconstruction Software based on the AliceVision framework: https://alicevision.github.io/#meshroom