Add a lot more sites

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There obviously many duplicates, sorry for that

Unsplash, Nohat, Pexels, PixaBay, PNGIMG (png), StockSnap, allthefreestock, altphotos, goodfreephotos, morguefile, desirefx, icons8 / 2, gfxmountain, all-free-download, freepik / Drive, creativity103, photos8, reshot, creativecommons, DreamsTime, OpenAccess, LibreStock, FreeImages, PixelMob, StorySet, behance, barnimages, gratisography, freeillustrations, kaboompics, picjumbo, negativespace, burst, barnimages, skuawk, undraw, rawpixel, drawkit, cgispread, unblast, freedesignfile, argfx, skitterphoto, copyrightfreephotos, libreshot, themeisle, pxfuel, depositphotos, foodiesfeed (Food), Illustrations, Objects, Humaaans, blush, cupcake, magdeleine, littlevisuals, picography, stickpng, lifeofpix, diverseui (Human Faces), designerspics, travelcoffeebook, publicdomainarchive, twnsnd, moveast, focastock, jeshoots, isorepublic, digitalcollections, flickr / Downloader, startupstockphotos, shutteroo, photostockeditor, photober, freerangestock, stockified, snappygoat, realisticshots, pickupimage, jaymantri, freelyphotos, crowthestone, cc0, photoeverywhere, freejpg, getrefe, titania, opendoodles, thestocks, sitebuilderreport, avopix, openverse, drawkit, 3D Illustrations, 3dbay, pixeltrue, marker-illustrations, free-gophers-pack, vecteezy, warrenphotographic (Animals), freenaturestock (Nature), 4freephotos, niceillustrations, NS-illustration-pack, manypixels, fresh-folk, iwaria, stockvault, slon.pics, pikwizard, aerophotostock, freestocks

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Vectors

vectorportal, publicdomainvectors, vecteezy, 123freevectors, freevector, freevectors, free-vectors, vector4free

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also check https://fmhy.net/img-tools#download-images if you want