Tracktion has a DAW called Waveform. They support and release a Linux installer; however, it is Debian-based. I just wrote to their support department asking if they have a Linux installer that unpacks and installs Linux binaries without depending on a .deb file. While I was able to unpack the 30-day trial .deb file and run Waveform, this is a bit inconvenient for users who are not on Debian-based systems. I will post if I hear back from them.