When it comes to sharing digital photos online - Flickr Photos, Google Picasa Web Albums and Zooomr rule the web. And now a free tool called Migratr has created sort of a "virtual bridge" between these photo services.
Migratr is a no-frills Windows utility that allows you to bulk
move copy photographs from one picture sharing service to another effortlessly using your hard drive as a temporary storage.
You select a source (like Flickr, Picasa) and every picture from your account is downloaded locally. The next half of the cycle will upload them to the destination. All the important information including picture title, description and tags are preserved during the transition.