FotoBilder is Danga's open source photo hosting software. If you're experienced with Unix, Apache, and databases, you can download it and use it on your own machine. Please consult the manual for instructions.
For more information about what distinguishes FotoBilder from other photo hosting products and services, see this page. (We'll be moving that page over here in the future.)
Most users will use FotoBilder via one of the two hosted services running the FotoBilder code: