deepin
deepin (formerly, Deepin, Linux Deepin, Hiweed GNU/Linux) is a Debian-based distribution (it was Ubuntu-based until version 15 released in late 2015) that aims to provide an elegant, user-friendly and reliable operating system. It does not only include the best the open source world has to offer, but it has also created its own desktop environment called DDE or Deepin Desktop Environment which is based on the Qt 5 toolkit.
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AV Linux
AV Linux is a versatile, Debian-based distribution featuring a large collection of audio and video production software. Additionally, it also includes a custom kernel with IRQ threading enabled for low-latency audio performance.