VoxForge is an open speech dataset that was set up to collect transcribed speech for use with Free and  Open Source Speech Recognition Engines (on Linux, Windows and Mac). 

We will make available all submitted audio files under the GPL license, and then 'compile' them into acoustic models for use with Open Source speech recognition engines such as CMU Sphinx, ISIP, Julius (github) and HTK (note: HTK has distribution restrictions).

VoxForge Downloads

• English
  • Acoustic Models:
    • HTK/Julius
      • Releases
      • Nightly Builds
    • Sphinx
    • Julius-DNN (mirror of JuliusModels, by Leslaw Pawlaczyk)
  • Speech Audio File Repository:
    • Speech Corpus
      • Audio
      • Lexicon
      • Prompts
  • Metrics (Alpha)