I'm thinking stuff that is available on Linux as well as Windows/OSx. Examples include Matlab, the Avizo image analysis suite, a certain simulation package tha

I'm thinking stuff that is available on Linux as well as Windows/OSx. Examples include Matlab, the Avizo image analysis suite, a certain simulation package that was described as AllSIM in a controversial discussion relating to CERN last week on HN and Maya (not scientific but it does illustrate the sort of high end very expensive niche stuff that tends to have Linux versions).