I made a realtime mac demo of the acoustic model part of wav2letter++ including several trained models:

https://github.com/facebookresearch/wav2letter/issues/327

Someone in that thread ported it to linux. This demo is just "acoustic model emissions", which are character level predictions (with no repeated characters), but I have "decoding" (turning into english sentences) working locally as well and I'll post a new demo at some point.