Zynthian is an Open Synth Platform based in Raspberry Pi, Linux (Raspbian) and Free Software Synthesizers (mostly).
The ZynthianOS SD-image includes all the software you need for building a ZynthianBox, including a good amount of sound libraries and presets. This repository contains system scripts & configuration files.
You can learn more about the Zynthian Project in any of our sites:
You can buy official kits in the zynthian shop: