1. cosmosscope is synopsys waveform tools (but have other analysis function on it , like math operation for signal ..) cosmoscope have windows/linux
hspice already release 2005.9 (hspice & cosmosscope)
2. sandwork spiceExplorer ,
also have windows & Linux version .
spiceExplorer also support aditspice format
3. Sprintsoft novas debuss
nWave(turboWave)
also can see hspice output , but early version only see **.tr0 , not support .AC or .fft database
4. use Linux wine + windows version awaves ==> I never try it
maybe can work
or use vmware + windows awaves