====== Kaldi ======
Kaldi is a toolkit for speech recognition written in C++ and licensed under the Apache License v2.0.
Kaldi is intended for use by speech recognition researchers. 

  * **Web site** : https://kaldi-asr.org

It’s being used in voice-related applications mostly for speech recognition but also for other tasks — like speaker recognition and speaker diarisation.
The toolkit is already pretty old (around 7 years old) but is still constantly updated and further developed by a pretty large community.
Kaldi is widely adopted both in Academia (400+ citations in 2015) and industry.
Kaldi is written mainly in C/C++, but the toolkit is wrapped with Bash and Python scripts.

Voximal embedded several connectors to use the kaldi engine.