[ALUG] Anything like Picasa for Linux?

Are there any programs like Picasa which run on Linux? I'm after something for organising my digital and scanned photographs. I don't want anything very clever, Picasa is actually pretty close to what I want except that I'd prefer to be able to manipulate the *real* folder hierarchy rather than a pseudo-hierarchy. -- Chris Green (chrisisbd@leary.csoft.net)