There is one single tool that rules the world for photo management. This tool is called Picasa. Up until now, it was only available for Windows, which sucked bigtime and I definitely liked the app. Big Google rules (again!). They created a linux version!
OK, not really. They made an installer that includes a specially configured Wine to run Picasa on Linux. But it functions just like a native Linux app!
So go and download your Picasa for linux :)