Windows/Mac/Linux: If you're looking for a quick way to download a photo album from Picasa without installing the desktop application, Picasa Album Downloader does just that — and you don't even need to register at the Picasa website.
Picasa is a terrific online photo storage service, but if you aren't a regular user, you may not want to register for an account just to download some pictures from your nephew's birthday party. Picasa Album Downloader lets you grab all the public photos you want without signing up for an account.
The free utility works on Windows, Mac and Linux, and really couldn't be easier to use. Once installed, just fire it up, tell the downloader what user name and album you're after, and it does the rest for you. The tool collects all the images in the album, then files them neatly in a folder on your hard drive.
Picasa Album Downloader was just released a couple weeks ago and still bears the beta label, but it worked just fine for us. What apps help you manage photos you download from online storage services? Talk about them in the comments.