Caesium - Image Compressor | Education & Numérique | Scoop.it

"Caesium reduces the size of pictures up to 90%, preserving the original visual quality.

It allows you to save a lot of space on your hard drive and quickly upload your pictures on the web (on sites like Facebook, Google+ etc) saving a lot of time. Also webmasters and bloggers need to make sure the images they post on their websites are optimized, to avoid prolonged loading times for their visitors."

 

And, Caesium is an OpenSource project.