Digikam 1.0.0 has finally been released. If you are not familiar with Digikam, let me tell you that it's probably the best photos organizer, that comes with an editor with various effects, fixes, etc. and the best of all, is open source (requires KDE 4.x, but that's not a problem I guess ). I always wanted to write a detailed review about it, but the program has many functions that you must learn to use and the time needed for this cannot be easily found. But since we have the final 1.0.0 release now, I'll probably put it in my mid-term TODO list.
Use your favorite Linux package management system to install it, or download the source and compile it yourself.