Speech recognition and voice commands

I have a neighbor who is paralized and uses voice commands to run his
Windows computer. He develops software for himself in VB so that he can
add to his voice commands and speech recognition functions. He has shown
interest in using Linux but I cannot answer his speech recognition
quesitons. I have started researching a bit but I wanted some opinions
from the list, assuming people here have dealt with this.

I am confident that speech recognition tools for Linux exist since there
is a speech recognition HOWTO and other information is easy to find. I am
most concerned about his development needs. What scripting and
programming tools can he use in Linux to replace the capability he now has
with VB and VBA in Windows?

This is a quesiton that applies outside of persons with handicaps so a
discussion on "VB and VBA replacement" is a good thing to have for
everyone.

(I post the question here instead of the devel list to reach a wider
audience.)

Alan



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