Picasa is software that helps you instantly find, edit and share all the pictures on your PC. Every time you open Picasa, it automatically locates all your pictures (even ones you forgot you had) and sorts them into visual albums organized by date with folder names you will recognize. You can drag and drop to arrange your albums and make labels to create new groups. Picasa makes sure your pictures are always organized.

Picasa also makes advanced editing simple by putting one-click fixes and powerful effects at your fingertips. And Picasa makes it a snap to share your pictures, you can email, print photos home, make gift CDs, instantly share via Hello, and even post pictures on your own blog.
The latest version includes Web Albums (along with other improvements), but requires that you request an account from Google.
Picasa is a lesson to the world in usability design. In less than five megabytes, this image organizer succeeds in being a completely rounded package with many editing tools that will satisfy part-timers and enthusiasts alike. However, what really makes Picasa stand out is the beautifully-executed interface, which proves a complete pleasure to use thanks to its speedy pace and some clever animations and fades.

Picasa Current Version:
Picasa 2.7 Build 37.49