MLT Multimedia Framework
The Java Multitrack Audio Recording Software AudioChain
Ready to go Professional Multitrack Recording by MixBus on MATE
Spatilization tool in in 2D and 3D
Free yourself
OS X Alternative that installs on most new or old computers
mintyMac 64 bit OS with Xfce4, Gnome,and E17
The Complete 64bit Audio and Video Linux Workstation
Mate Desktop with OS X look and feel, System Sounds, MDM, Compiz etc
Simple handling of Jack, multi-track recording and music player
A tool for automated downmixing of live multitrack sound recordings