Mfile - Simple, fast, free photo galleries. No login required.
Libris - Libris is an asset management for photos and videos.
gpic - Either you are posting something on Reddit, DEV, Indiehackers, or any other place, you need to host your images somewhere.
picinfinity - Picinfinity is an image retaining/proxy site.
Jollyshot - Ephemeral image hosting
Imagesocket - A different kind of image hosting