The characteristics of XodaGallery:

• Upload images
• Automatically create thumbnails (size by setting)
• Gallerypage with adjustable size/number of images. You can restrict to one image per page
• View each image in lightbox or on its own page
• Comment on images
• Spam protection with: Bad-Behavior, Ban Ip, Ban Words
• Create categories to put images in.
• Multiuser
• Feeds as RDF, RSS2, Atom
• Manage users logins
• Create your skin with CSS
• Alter firstpage to your wishes (you can use the gallerypage, an url or html-file)
• It is free under Lesser GPL-license!