5. Google Picasa

Picasa is one of the most preferred free photo editor and organizer in this highly competitive market. It scores because of the seamless workability. It lets you import, organize, and perfect your digital photos. The new version adds a bunch of clever new effects, thanks to Google's purchase of the much-loved Picnik online photo editor.

The only problem is that for a Facebook upload you requires plug in. it also does not have a Linux version. But Picasa is still one of the best ways to edit and upload photos.