The Mycroft AI, Inc. has released an open source platform called Mycroft core that promises to allow users to "use natural language to control the Internet of Things".  the Mycroft framework also includes an intent parser called adapt and a TTS engine (based on CMU's Flite) called mimic.  For speech recognition they are currently using Google's cloud-based speech recognition service.

They've also created a reference hardware implementation based on Raspberry Pi and Arduino and have had successful kickstarter and indiegogo campaigns to raise funds.

Since their stated goal is to provide an open source alternative to the likes of Amazon echo, the Mycroft AI group has started a new initiative called OpenSST (an Open Source Speech To Text project) looking to create "open source speech-to-text models"... likely for Kaldi.