Vienna MIR seems to do more or less what you're asking: http://www.vsl.co.at/en/211/497/1687/2002/1691.htm http://www.vsl.co.at/en/211/497/1687/2002/1691.htm

Vienna MIR seems to do more or less what you're asking: http://www.vsl.co.at/en/211/497/1687/2002/1691.htm http://www.vsl.co.at/en/211/497/1687/2002/1691.htm ...though it's not open source. (I share it anyway, in the event it's helpful to someone here for whom being open source is not a hard requirement.)