In case you missed it, the developer team has released a new main version of the DarkTable RAW converter, which is especially popular with Linux and Mac users. DarkTable is a virtual light and dark room for managing digital negatives (RAW files). The development of the image files is done by means of so-called sidecar files, allowing the pictures to be edited in a non-destructive manner.
Darktable is an open source photography work-flow application and RAW developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.