Shotwell is an open source photo organizer designed for the GNOME desktop environment.
Features:
1. Import
Import photos from folders or from any digital camera supported by gPhoto.
2. Organize
Shotwell automatically groups photos taken at the same time. You can also use tags to organize your photo collection.
3. Edit
You can rotate, crop, reduce red-eye, and adjust the exposure, saturation, tint, and temperature of each photo.
4. Publish
Publish photos to Facebook, Flickr and Picasa Web Albums.