I'm happy to be back after about 2 years away from Linux.  The
 audio/music world seems to be taking off and thats great.  I'd
 like some general comments on what would be peoples favorite
 reactor type synth in Linux as of now.  I'm primarily interested
 in realtime, multi timbral midi controlled synths.  How about
 sequencers?  Thanks for any advice,
 Ken
  
abSynth
zynaddsubfx
iiwusynth (now fluidsynth I think)
Alsa-Modular-Synth (ams)
Spiral-Synth-Modular (ssm)
sequencers - Rosegarden or Muse I suppose...