Okay updating and consolidating lots of info here; as well as adding links for ease of access. Adding a brief description for some too; as is the case that not all of them have descriptions above.
(Warning that some of these links contain nude refs, I will try to mark where possible which ones have more prominent ones.)
Adorkastock. Stock photos for pose refs. DeviantArt gallery started in 2007.
FreePhotoMuscle.com. (translated page link click here) Japanese stock photo pose site that includes buff people, but in funny poses and costumes.
CroquoisCafe. (NSFW, nude model poses warning) A stock photo pose site. You should be aware this org has been linked as pro-Trump. I leave it to y’all to decide if you want to use the resources or not. I highly encourage not financially supporting them and trying to support the individual models if you can.
Line of Action. Fantastic site that includes posing refs, community discussions from other artists, figure study, anatomy, etc. So much stuff in here.
PoseSpace. Extensive library of poses. Some free resources others are paid. I’ve not fully evaluated both, but you should be able to use this all mostly free and get great use out of it.
SketchDaily. This one is one of the better ones out there. You can time yourself, search by pose, clothing options, body type, perspective, etc. All real models.
JustSketch.me. A pose app for any device. Has apps for most devices and a webapp. Customize and pose models/props/scenes.
Quickposes. Pose site that gives you timed challenges to become more proficient at poses.
POSEMANIACS. Ref site with anatomical poses. All the ref pics are of 3D models with only the bones and muscles. Can be helpful for seeing how muscles behave in certain poses. limited to two body types tho.
MagicPoser. A wonderful app that’s great on mobile. Lets you choose size of models, number of them, style, etc. Significant features are use of snap point with the physics engine, adjustable lighting, multiple perspective, 360 angle, articulated hand posing.
Clip Studio Paint Modeler. Free 3d tool that works with Clip Studio Paint. You can import your own data or other models you find online. Not quite an alternative to Blender, but the integration with CSP is very nice.
Egg a Zyoutatsu Atarichan Drawer. (requires enabling flash player or downloading and using standalone flashplayer) Drawing tool for pose practice. The developer is working on an html5 version.
DesignDoll. One of the best pose tool apps out there. You can customize so many things. They also have an extensive collection of ready made poses here. You can use the free or pay once for life and have the poses integrated into the client as well as the ability to export your obj to other programs like blender or smt.
Unsplash. Giant free stock image site.
freeimages.com. Another stock photo site, less features than some others.
StockSnap.io. Stock photos with a creative commons CC0 license, which essentially means you can use the photos however you want and don’t have to attribute to them. (though its nice if you do attribute)
Burst.Shopify. Tons of royalty free high quality images. Similar licensing to StockSnap.
pixabay. I feel like most people know about this one, but it features entirely free CC0 licensed Photos, Videos, and Music. No attribution required, but still nice to support a giant site with all this content.
Viintage. Big collection of public domain vintage photos.
Gratisography. For commercial or personal use. They specialize in odd, quirky, wild stock photos.
pexels. Great free stock photos and videos. Only a few stipulations of what they don’t allow, but their license info can be found here.
Faestock. An artist and model with a huge amount of fantasy and fae and other types of photos available. Their terms for use are here.
MorgueFile. Old stock photo archive that’s been around a long time.
Museum and Institution Open Access sites:
USA National Gallery of Art. Over 50k works available for download.
New York Metropolitan Museum open access. 490k works to browse. Even codes for Animal Crossing New Horizons patterns.
The Smithsonian Institution open access. Probably one of the largest open access collections available online. Around 3.9 million items available to view.
Many More. This article from Apollo magazine has an extensive list of open access museums and institutions from around the world. A brief list of places includes: Art Institute of Chicago, Belvedere, Vienna , Birmingham Museums Trust , Cleveland Art Museum , Harvard Art Museums , J. Paul Getty Museum, Los Angeles , Kunstmuseum Basel , Library of Congress, Washington, D.C., Los Angeles County Museum of Art , Mauritshuis, The Hague , Minneapolis Institute of Art , Munch Museet, Norway , Museum of New Zealand Te Papa Tongarewa, Wellington , Národní galerie Praha , Nationalmuseet Danmark , Nationalmuseum, Stockholm , New York Public Library , Paris Musées , Pinakotheken, Munich, Rijksmuseum, Amsterdam, Städtische Galerie im Lenbachhaus, Munich, Statens Museum for Kunst, Copenhagen , Wellcome Collection, London , Yale University .
