“Ardour
While it may surprise you, Linux is building a reputation in the
music world thanks to Ardour, a feature-packed Digital Audio
Workstation (DAW). Ardour lets you record and play as many tracks
as your hardware can handle, with non-destructive editing and
countless effects. It does lack MIDI sequencing support (that’s
coming in version 3), but if you’re happy to work with audio
directly, or use an external sequencer, Ardour is a fantastic way
to make music. Platform: Linux, Mac OS X“Rawstudio
With the rise of digital SLR cameras, more and more people are
using RAW format, and Rawstudio is the easiest way to handle these
files under Linux. It lets you open RAW files and perform
preliminary processing on them, such as colour management, white
balancing, exposure correction, cropping, and straightening, all in
full RAW fidelity, before exporting them to JPEG or PNG for further
editing. It also supports batch processing, so you can perform
corrections across sets of photos with ease.”