http://www.conversay.com
Computational Computing Corp. sells application specific speech enabled products including voice responsive browsers, office messaging system, speech SDK's for mobile devices, telephony speech servers.
http://www.software.ibm.com/speech/
Big Blue's ViaVoice offerings in the desktop continuous speech dictation arena. Competes with Dragon Systems. Has mobile dictation and telephony products as well. Has continuous speech recognition for the Apple Macintosh.