pixiv, DeviantArt, Fur Affinity, Behance, ArtStation, Dribbble, Toonator, MangaDojo, PaintBerri, OpenGameArt.org, Creary, okekai, Wysp, PaigeeWorld, Logamp, Crevado, Doodle Addicts, Weasyl, Carbonmade, Piikx.com, 23 hq, Fabrik, fotocommunity, Zerply, Psddd, SkinBase, Cure WorldCosplay, Freelancer Club, Creative Portfolio, BlabJam, Pixbuf, Artist Viewpoint are some alternatives to PENUP.