DEMOSTHeNES Speech Composer
- A general-purpose multilingual and polyglot software text-to-speech (TTS) system that supports the Greek language using a wide variety of e-text sources. Free download has an open and component based architecture allowing flexibility, customization and ex
- http://speech.di.uoa.gr/synthesis/demosthenes/en/information.shtml

IBM Text-to-Speech Research
- IBM Text-to-Speech (TTS) Research interactive demo, multi lingual, unconstrained.
- http://researchweb.watson.ibm.com/tts/

MARY Text-to-Speech System
- Open source TTS System for German, English and Tibetian based on Mbrola.
- http://mary.dfki.de/

Teknoses Speech Solutions
- Turkish Text-To-Speech engine for Microsoft Agent and SAPI compliant applications. Trial version downloadable.
- http://www.teknoses.com

Nuance
- TTS engine Realspeak available in many languages. Company (former Scansoft) bought many TTS-manufacturers, e.g. Rhetorical, ETI-Eloquence, Nuance, Lernhout & Hauspie.
- http://www.nuance.com/

NeoSpeech
- TTS engine VoiceText is available in US English, Korean, Japanese and Mandarin Chinese.
- http://www.neospeech.com

Java Applet for Speech Synthesis
- Java applet/software for speech synthesis using the concatenation method. Currently developing formant synthesis version.
- http://www.say-it-now.com

Matrubhasha
- A Unicode and MBROLA based software solution for text to speech synthesis (TTS) in Indian languages.
- http://www.ncb.ernet.in/matrubhasha/

The Festvox Project
- Free software tools and documentation for building new speech synthesis voices in English and other languages. Associated to Festival TTS. From Carnegie Mellon.
- http://www.festvox.org

Hindi Text To Speech System
- Bliss Intelligent Technologies offers Hindi text to speech, Hindi OCR, Hindi speech recognition and IVR systems. Based Jaipur, India.
- http://www.blissit.org

ILSP - Ekfonitis+
- Ekfonitis+, Greek Text to Speech Synthesis from the Institute for Language and Speech Processing, Athens, Greece.
- http://www.ilsp.gr/ekfonitis_plus_eng.html

SVOX Interactive Text to Speech Demo
- TTS-Demo of University of Zurich. Makes an .au file of German (only) text typed at web site.
- http://www.tik.ee.ethz.ch/cgi-bin/w3svox

Sakrament
- Speech recognition and synthesis software company, particularly Russian language. Markets a product to generate personalized voice-models (voice-cloning).
- http://www.sakrament-speech.com

Voiceinterconnect GmbH
- Wide range of products and services for embedded electronics including echo cancellation, DSP, speaker independent recognition and text to speech.
- http://www.voiceinterconnect.de/index.php?newLanguage=en

Loquendo
- TTS manufacturer from Italy, support for many languages, online demonstration available.
- http://www.loquendo.com/en/technology/TTS.htm

IMS: German Research Group
- Speech synthesis group at the IMS, University of Stuttgart, Germany: Online demo, speaking metro information system, various speech synthesis example sand some downloads. Research is concentrating on getting good prosidy (inflection).
- http://www.ims.uni-stuttgart.de/phonetik/synthesis/

FreeTTS - Java speech synthesis
- A speech synthesis system written entirely in the Java(TM) programming language. Based upon Flite: a smallrun-time speech synthesis engine developed at Carnegie Mellon University and derived from the Festival Speech Synthesis System from the University o
- http://freetts.sourceforge.net

Fonix Corporation
- Communications and technology company that provides integrated telecommunications services and value-added speech technologies. The combination of interactive speech technology and integrated telecommunications services provides for solutions to enhance a
- http://www.fonix.com

AT&T Natural Voices
- Features a line of speech synthesis products. Demos on the site.
- http://www.naturalvoices.att.com

E-Speech
- Unusual text-to-speech synthesis offerings including name pronunciation software for speech recognition dictionaries and other custom applications.
- http://www.espeech.com

ESOPOS-Greek TTS
- An unusual downloadable program for Win 95/98 that does Greek text-to-speech processing.
- http://esopos.ee.auth.gr

e-rhetor
- Develops applications and systems that support the Greek language. Current products include a series of high quality Text-to-Speech products for the telecommunications and multimedia market.
- http://www.e-rhetor.com

Elan Speech
- Elan Speech, dedicated global provider of text-to-speech (TTS) technologies for telecommunications, multimedia, embedded systems and mobile solutions. Provides 2 ranges of speech synthesis technologies for high quality and low footprint requirements. Man
- http://www.elanspeech.com

CSLU Speech Synthesis
- Center for speech synthesis research, with demos and downloads available. Has a singing voice synthesis project.
- http://cslu.cse.ogi.edu/tts/index.html

Cepstral Speech Synthesis
- Text-to-speech for a wide selection of platforms - including servers, desktops and mobile. Provides a variety of languages, voices, and accents. Effective on line demo of speech quality.
- http://www.cepstral.com

Bitlips Speech Technologies
- Finnish Speech Synthesis, offers small footprint as well as unit-selection engine. English language also available.
- http://www.bitlips.fi

Acapela Group
- Merger of TTS companies Babeltech, Elan and Infovox. Many TTS-engines with online demonstrations.
- http://www.acapela-group.com