You can download the most recent version of Ωnyx for Windows, Mac OSX, and Unix/Linux here:

 Stable release
Ωnyx (Version 1.0-1010) Last update: 1st June 2018
Developer release
Ωnyx (Version 1.0-1026)  Last update: 28 March 2019

Ωnyx requires the JAVA runtime environment (version 1.6 or later). If you haven’t installed JAVA, please download a recent version here.

The Ωnyx is provided under the Onyx license.

Previous versions (not recommended):

Ωnyx (Version 1.0-972)

Ωnyx (Version 1.0-953)