BioSig - An application of Octave
  BioSig is an open source software library for biomedical signal processing. Most users in the field are using Matlab; however, significant effort was undertaken to provide compatibility to Octave, too. This effort has been widely successful, only some non-critical components relying on a graphical user interface are missing. Now, installing BioSig on Octave is as easy as on Matlab. Moreover, a benchmark test based on BioSig has been developed and the benchmark results of several platforms are presented. 
Alois Schl\"ogl