Picasa is free software from Google that helps you locate and organise all the photos on your computer, edit and add effects to your photos, and share your photos with others.
Not in the Top 100 in 2013
Comments from some of those who selected Picasa as one of their Top Tools
“I’ve used picasa in school to share photos (albums) that I put together to supplement different aspects of my curriculum.” Mary Howard
“great for cropping and touch ups of pictures” Lisa Neal
“it’s a rapid way to touch up photos” Jay Cross