| Kaldi | Speech recognition toolkit | http://kaldi-asr.org/ |
| HTK | Speech recognition toolkit | http://htk.eng.cam.ac.uk/ |
| Voicebox | MATLAB toolbox for speech and audio processing | http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html |
| Wavesurfer | Sound visualization and manipulation tool | https://sourceforge.net/projects/wavesurfer/ |
| Praat | Sound visualization and manipulation tool | http://www.fon.hum.uva.nl/praat/ |
| CVX | MATLAB software for disciplined convex programming | http://cvxr.com/cvx/ |
| Theano | Python library for numerical computation | http://deeplearning.net/software/theano/ |
| Cantonese Phones & Jyut Ping symbols | http://dsp.ee.cuhk.edu.hk/research-tools/Cantonese-phones.html |
