Piwigo is a stable and mature open source photo gallery software for the web, built by an active community of users and developers, since 2002. Easy to customize with plugins and themes. Features include FTP/HTML5/remote application uploaders, multiple size, watermark, mobile themes, mobile applications (iOS, Android, Windows Phone), user/group, oAuth (Facebook connect, Google connect...), albums, tags, privacy, user comments, user upload, search, rating, EXIF/IPTC, calendar browsing, map browsing, pages, slideshow, email/RSS notification. Piwigo is available in 56 languages.