I want to know availability of fully developed ASR systems for any Indian language - either LVCSR systems or limited vocabulary systems deployed in enquiry based services. (i) Is anyone available for purchase on a licence basis ? (ii) Even if it is not available for buying, has any system been practically deployed for some application and can be tested by public through that service?
https://freeswitch.org/confluence/display/FREESWITCH/ASR
You can look into this link for a start.
Do you want the ASR to understand the Indian language? If not an ASR used by api.ai can recognize the Indian popular words (many languages). Note that it is not ASR for Indian languages. Cortana team is also working on similar directions.
I thought I made it very clear: Fully developed ASR for any Indian language.
I must also mention that ASR neither understands any language nor actually recognizes the content of speech. Today's best ASR is just a transcription system, which matches an input stream of speech to an output stream of words from its pre-stored vocabulary. Understanding the speech ? Forget it. Nobody is even thinking of it, even at the design stage.