by Roberto Togneri

Speech Research frequently involves the use of sophisticated software, and the best software is, of course, free! Here is a list of well-known (and perhaps not so well-known) software for SST research and deployment:
Hidden Markov Model Toolkit (HTK) 
http://htk.eng.cam.ac.uk/
Festival Speech Synthesis System 
http://www.cstr.ed.ac.uk/
projects/festival/

CMU Sphinx Speech Recognition Engine 
http://www.speech.cs.
cmu.edu/sphinx/

VoiceBox: Speech Processing Toolbox for MATLAB 
http://www.ee.ic.
ac.uk/hp/staff/
dmb/voicebox/voicebox.php

CSLU ASR Toolkit 
http://cslu.
cse.ogi.edu/toolkit/

NIST Tools and APIs 
http://www.nist.gov/speech/
tools/index.php

Praat: Doing Phonetics by Computer 
http://www.fon.hum.uva.nl/
praat/

Speech Filing System: Tools for Speech Research 
http://www.phon.ucl.
ac.uk/resource/sfs/

Edinburgh Speech Tools Library 
http://www.cstr.ed.ac.uk/
projects/speech_tools/

CMU Statistical Language Modelling Toolkit  http://www.speech.cs.
cmu.edu/SLM_info.php

WaveSurfer: Sound Visualization and Manipulation 
http://www.
speech.kth.se/wavesurfer/

ISIP ASR Toolkit 
http://www.
isip.msstate.edu/projects/
speech/software/index.php

For a list of these and all WWW resources on speech science and technology known to me please stop by my Spoken Language Systems page:
http://ciips.ee.uwa.edu.au/
~roberto/research/speech.php
or checkout the ASSTA WWW Links page:  http://www.assta.org/
assta_sites.php

Have you come across any interesting URLs? Is there a classic book or journal in your area of research? Are you aware of useful software or speech data? If so, please send your contribution to me at:
roberto@ee.uwa.edu.au
Contributions should contain a title, reference and one paragraph description of the resource.