Minimal speech recognition -- discrete/command/control

[Richard Owlett <rowlett@cloud85.net>]

I'm looking for speech recognition [speech to text] for command entry tasks.
My keywords are:
  discrete speech
  small vocabulary
  speaker independent [not critical]

IOW something on the other end of spectrum from Sphinx.
My background is at least a decade out of date.
I'm assuming an external amp and digitizer [cruddy sound means 
unsatisfactory performance.
I prefer FOSS software.
I don't have accessibility issues -- just lousy typist.
Is this list appropriate?

Thank you