There are already a lot of useful plug-ins for downloading or uploading from online sites such as Flickr, Picasa Web, Snapfish, Webshots (disclaimer: owned by CNET Networks), and the rest, but most applications only work with one specific service.
If you want to move all of your images from one site to another (if you're one of those unhappy Flickr users, for example), and you're not looking forward to manually downloading and uploading hundreds of pictures, Migratr might be able to help. A home-brewed tool from independent developer Alexander Lucas, Migratr automatically downloads all of your photos from one site, and uploads them to the other.
It sounds great, so what's the catch? Well, Migratr only currently includes support for Flickr, Picasa Web, 23HQ, SmugMug, and Zooomr (which shouldn't even be counted because it has temporarily disabled bulk uploaders). However, downloading and uploading among the four available online photo services worked wonderfully for me. I must admit, however, that I was transferring tens of files, not thousands.… Read more