In the native Linux VST section, you might want
to add Wolpertinger, a little subtractive synth in development, open
source:
http://tumbetoene.tuxfamily.org/index.php?category=1
Done. :)
Another excellent Linux native VST host is Renoise:
www.renoise.com.
Non-free though, demo available, the full version costs 58 euros.