The following projects use Sphinx:

• Lumenvox: Commercial software company that uses a tuned sphinx2 to offer speech solutions geared towards IVR's.

• Microsoft Whisper: Of course you know what this is. What you didn't was that it uses sphinx 2!

• Cairo: Cairo provides an enterprise grade, Media Resource Control Protocol Version 2 (MRCPv2) compliant speech server solution utilizing sphinx 4.

• Asterisk plugin: Integrates pocketsphinx into Asterisk.

• Freeswitch: Asterisk alternative(more open). It uses pocketsphinx to offer speech recognition.

• jvoicexml: Free VoiceXML interpreter for Java with an open architecture for custom extensions.

• Gnome-Voice-Control: Gnome-Voice-Control is a dialogue system to control the GNOME Desktop.

• perlbox: Provides voice solutions for Linux and Unix desktop control.

• Zanzibar: Zanzibar OpenIVR is a complete, standards based, open source IVR.

• Mammoth: Becoming a full blown high concurrency C++ Flash Streaming Server running on windows and *nix. Uses pocketsphinx for speech recognition.

• ASTRA - Advanced Sphinx Trainer: ASTRA is a Free (under GPL v3) project manager for CMU Sphinx-III.

• Twitterkiller - TWiT podcast improver, filters advertizing

• Arabisc - Arabic acoustic model.

• Voicekey -- voice-controlled keyboard for GNU/Linux --- project also provides scripts for automated compilation of language models, two language models for typed input to various programs (one with word frequencies and one with keyboard keystroke frequencies), scripts to help with acoustic adaptation, and a modified sphinx3_livesegment that can accept console commands to dynamically reload the LM and change some parameters. Open source.

Know any other projects that use Sphinx? Please add them!