Pop Art:
https://popartstudio.nl/
https://www4.lunapic.com/editor/?action=art
Street Art:
https://www.graffiti-empire.com/graffiti-generator/
https://graffwriter.com/graffwriter/create.php#
https://www.textstudio.com/logo/graffiti-generator-447
Op Art:
https://coloringbook.pics/category/coloring-books-for-kids/mandalas/
https://nathanfriend.io/inspiral-web/
https://bomomo.com/
https://toytheater.com/polygon/
Abstract Art:
https://jacksonpollock.org/