Find the pictures you forgot you had. Picasa organizes your entire collection while you watch, scanning the images on your computer and automatically sorting them by date. Move and re-name pictures from inside Picasa.
Want to clean up messy folders and move pictures around on your computer’s hard drive? Simply drag and drop pictures from one folder in Picasa to another. Picasa will make the change permanent after double-checking with you.
Want to change a picture’s filename from 671056398a.jpg to Lisa.jpg? In Picasa, it only takes seconds to re-name one picture or a group of pictures. Make a label. Use labels to tag your photos into quick groupings inside Picasa. Viewing and sharing the pictures you grouped under a label is easy – they make great slide shows and movies or you can email them to friends.
Add a star rating. Give a gold star to any photo you love: it turns your favorites into visual standouts at a glance. Picasa even has a star search that reduces your entire photo collection to the best of the best in less than a second.
Keep one picture in multiple albums. Picasa creates a new “instance” of each photo you label without taking up more space on your computer, so you can put the same picture into multiple albums.
Password-protect collections. Have photos you want to keep to yourself? You can add passwords to any of your Picasa collections (this does not affect which pictures you and others can see on your computer’s hard drive).

Picasa is a program developed by Google, Inc. whose function is to allow the user view and organize the pictures in his/her Mac.
Picasa searches for all the images in your HD and shows them on an eye-catching and intuitive interface. Without any doubt, the presentation is one of the high points of this applications.
It includes some advanced features really easy to use. Picasa allows you to burn your pictures in a CD and it creates slideshows on fullscreen.
You can configure the printing options as you desire and allows you to extract the photos from your digital camera. Now, and thanks to Picasa you will have the album you desired and you will be able to see your photos anytime you want.