PhotoPrism, Piwigo, Flickr, Lychee, Lutim, fgallery, MediaCMS, Slidebox, LibrePhotos, jAlbum, novaGallery, Zenphoto, PhotoStructure, Coppermine Photo Gallery, Nextcloud Photos, MediaGoblin, Zoph, Plogger are some alternatives to JCDSee Web Photo Gallery.