Software for HRV-Training?

Hi,

is there any suitable software to use openEEG or Olimex EEG-SMT for  
HRV-Training ("Heart rate variability")´?

I want to do HRV-Training on my own. I just started with a trainer, who  
suggested to buy a "Qiu" (which looks at the pulse in the thumb with an  
optical sensor). BUT:

Triggered by my hobby (electronics), I'd like to do buy the Olimex EEG-SMT  
together with a suitable software for HRV. (I believe, it might be more  
accurate than the optical sensor systems, and additionally, I'd like to  
experiment with EEG-biofeedback, too.) Unfortunately, I cannot find any  
suitable software, for this purpose. (Should be for free or less then ~100  
Euro).

Do You know of any software which is (could be) used for HRV-Training with  
openEEG or Olimex EEG-SMT?

My background:
* I can build/change hardware;
* Regarding software, I only know to program RUBY programming language.


Thank you in advance
Axel

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