[$] LightZone reborn as free software
One of the first high-quality raw photo editors available for Linux
desktops was LightZone, but although it was (initially) free of charge,
it was a proprietary product.  Unfortunately the small company behind it
eventually folded, and both the free and paid versions went away, as
did the updates required to support newer cameras.  The company shut
its doors for good in 2011, but the software has made a
sudden—and unexpected—comeback as an open source project.
Fans of the original will be pleased, but the nascent effort still has
considerable work ahead before it grows into a self-sustaining
community project.