We had the Audacity project for a powerful audio recording and editing environment. We now have the ardour project for a true audio workstation that targets to compete the major options available.
According to the Ardour project web site: “Ardour capabilities include: multichannel recording, non-destructive editing with unlimited undo/redo, full automation support, a powerful mixer, unlimited tracks/busses/plugins, timecode synchronization, and hardware control from surfaces like the Mackie Control Universal. If you’ve been looking for a tool similar to ProTools, Nuendo, Pyramix, or Sequoia, you might have found it.“
Ardour currently runs on Linux, Solaris, and Mac OS X.
More, SAE recently announced its support to this project.