These are the 5 design resources I mainly use.
1. humaaans
Website: https://www.humaaans.com/
License : CC – Free for commercial or personal use
As the website name says, the illustrations are mostly related to humans. You can download the assets in png, svg, sketch formats
Download formats: png, svg, sketch
2. Undraw
Website : https://undraw.co/
License: Free to use for personal and commercial projects, without the need to include attribution.
Even though its free, whenever possible give credits to the designer/developer. These things needs time and effort.
Download formats: svg, png
3. Pixabay
One of the best sites for free vectors and png files
Website: https://pixabay.com/
License: mostly Pixabay License – Free for commercial use, No attribution required
Format: png, svg
4. FreeVector
This site has free as well as paid assets
License: Attribution required
Format: svg, png
