We have covered tools like Skydrive Explorer (for accessing Skydrive from Windows Explorer) and Flickr Drive. And now you can integrate Picasa with your Windows Explorer using PicasaExt. PicasaExt aims to add features to Windows Explorer to better integrate with Picasa. You can access your Picasa files right inside Windows Explorer and also download them to your desktop easily.
If you have starred any images in Picasa, the tool adds a star overlay to images starred. You need to restart the PC after installing this application.
PicasaExt works with Windows XP, Vista, or Windows 7, both 32 bit and 64 bit versions