Hello,
Fittingly, to a current topic, u-he made available today the Repro-1
synth, a Sequential Circuit Pro One emulation, their first emulation to
date. Currently in beta, the Linux version is available for free until
the end of the year. See KVR:
http://www.kvraudio.com/forum/viewtopic.php?f=31&t=472608
u-he is one of those that supports the Linux platform. They don't have
to, but they do. Their support is dedicated through the KVR u-he forum
and is largely the work of Alexandre Bique whose Git Hub repository
(for other works) is at:
https://github.com/abique
Cheers.