a list of spoken language interfaces

Here's a growing list (disclaimer) of spoken dialogue systems that have been developed at various places throughout the world. Additions (if your system is missing) and corrections are always welcome: please email me. A similar page containing links to various spoken dialogue system projects is maintained by Staffan Larsson.

 AdApt
Description:  A multi-modal conversational dialog system, operating in an apartment domain [Swedish spoken].
Developed at:  CTT, KTH, and Telia Research, Stockholm, Sweden Web-site:  [click here]
Phone #:  Samples: 
Developers:  Joakim Gustafson, Linda Bell, Jonas Beskow, Johan Boye, Rolf Carlson, Jens Edlund, Bjorn Granstrom, David House, Mats Wiren, Magnus Nordstrand


 Ariadne
Description:  Platform for rapid prototyping of spoken dialogue systems. Together with MS SAPI compliant recognizers and text-to-speech systems, you can build an entire dialogue system. The system supports UTF8 encoded unicode so that implementations in other languages, including Chinese and Japanese, are possible.
Developed at:  [CMU, USA] Web-site:  [click here, USA]
Phone #:  Samples:  [click here, USA]
Developers:  Matthias Denecke


 AthosMail
Description:  a multilingual adaptive spoken dialogue system for e-mail domain
Developed at:  [Speech-based and Pervasive Interaction Group, Tampere, USA] Web-site:  [click here, USA]
Phone #:  Samples: 
Developers:  Markku Turunen et al.


 August
Description:  A Swedish multi-modal dialog system, using an animated agent modeled after the 19th century author August Strindberg [Swedish spoken].
Developed at:  CTT, Stockholm Web-site:  [click here]
Phone #:  Samples:  [movie]
Developers:  Linda Bell, Jonas Beskow, Rolf Carlson, Joakim Gustafson, Nikolaj Lindberg, Magnus Lundeberg, Tobias Öhman


 Bayesian Receptionist
Description:  Emulates a Microsoft campus front-desk receptionist. The system does basically goal identification and is based on the Quartet architecture.
Developed at:  Microsoft Research Web-site:  [click here]
Phone #:  Samples: 
Developers:  Eric Horvitz, Tim Paek


 BusLine
Description:  BusLine is a VoiceXML application built on top of the Tellme Platform that allows you to find out about the buses around CMU, Oakland and Squirrel Hill.
Developed at:  CMU, USA Web-site:  [click here]
Phone #:  1-800-555-TELL (ext: 1-84083) Samples: 
Developers:  Ariadna Font Llitjos


 CTT-Bank
Description:  CTT-Bank is a speech controlled telephone banking system. Uses speaker verification to authenticate users. Build on the ATLAS platform. [Swedish spoken]
Developed at:  CTT, Stockholm Web-site: 
Phone #:  Samples:  [paper]
Developers:  Magnus Ihse, Håkan Melin, Anna Sandell


 CoBotDS
Description:  CoBotDS is a spoken dialogue agent that allows users to interact with participants in the LambdaMoo chat room
Developed at:  AT&T, USA Web-site:  [click here]
Phone #:  Samples: 
Developers:  Michael Kearns, Charles Isbell, Satinder Singh, Diane Litman, Jessica Howe


 Communicator (AT & T)
Description:  A mixed-initiative spoken dialog system operating in the air travel-planning domain. The system acts as a travel agent, and is able to handle multi-leg trips, hotel and car reservations.
Developed at:  AT&T, USA Web-site:  [click here]
Phone #:  1-877-289-8021 Samples: 
Developers:  Rambow Owen


 Communicator (BBN) - aka Talk'n'Travel
Description:  A mixed-initiative spoken dialog system operating in the air travel-planning domain. The system acts as a travel agent, and is able to handle multi-leg trips, hotel and car reservations.
Developed at:  BBN, USA Web-site:  [click here]
Phone #:  1-800-470-4249 Samples: 
Developers:  David Stallard


 Communicator (Carnegie Mellon University)
Description:  A mixed-initiative spoken dialog system operating in the air travel-planning domain. The system acts as a travel agent, and is able to handle multi-leg trips, hotel and car reservations.
Developed at:  Carnegie Mellon University, USA Web-site:  [click here]
Phone #:  1-412-268-1084, 1-412-268-5144 Samples:  [wav-1]
Developers:  Alex Rudnicky, Wei Xu, Tina Bennett, Ananlada Chotimongkol, Dan Bohus, Kevin Lenzo, Alan Black


 Communicator (Colorado University)
Description:  A mixed-initiative spoken dialog system operating in the air travel-planning domain. The system acts as a travel agent, and is able to handle multi-leg trips, hotel and car reservations.
Developed at:  Colorado University, USA Web-site:  [click here]
Phone #:  1-303-735-5189, 1-866-735-5189 (enter # as PIN) Samples:  [real-audio] [wav] [transcript]
Developers:  Wayne Ward, Bryan Pellom, Zhang Jianping, Kadri Hacioglu, Xiuyang Yu, Sameer Prahdan


 Communicator (Lucent/Bell Labs)
Description:  A mixed-initiative spoken dialog system operating in the air travel-planning domain. The system acts as a travel agent, and is able to handle multi-leg trips, hotel and car reservations.
Developed at:  Bell Labs, USA Web-site:  [click here]
Phone #:  1-908-582-6945 Samples:  [transcript]
Developers: 


 Communicator (SRI)
Description:  A mixed-initiative spoken dialog system operating in the air travel-planning domain. The system acts as a travel agent, and is able to handle multi-leg trips, hotel and car reservations.
Developed at:  SRI, USA Web-site:  [click here]
Phone #:  Samples:  [transcripts]
Developers: 


 Conquest
Description:  Spoken dialog system that provides conference schedule information (deployed during Interspeech-2006 and IJCAI-2007)
Developed at:  Carnegie Mellon University, USA Web-site:  [click here, USA]
Phone #:  Samples: 
Developers:  Rohit Kumar, Dan Bohus, Gopala Krishna, Venkatesh Keri, Sergio Grau Puerto, Stefanie Tomko, Antoine Raux


 DINEX
Description:  DINEX is a conversational system that provides information about Boston area restaurants and how to find them.
Developed at:  MIT, USA Web-site:  [click here]
Phone #:  not publicly available Samples: 
Developers: 


 Deep Listener
Description:  Provides spoken input to LookOut, and integrates natural clarification dialog into spoken command and control.
Developed at:  Microsoft Research Web-site:  [click here]
Phone #:  Samples: 
Developers:  Eric Horvitz, Tim Paek


 DiSCoH
Description:  DiSCoH (Spoken Dialogue System for Conference Help) is a goal-oriented, mixed-initiative, human-machine spoken dialogue system for conference information
Developed at:  AT&T Labs, ICSI, and Edinburgh University Web-site:  [click here, USA]
Phone #:  Samples: 
Developers: 


 ELVIS
Description:  ELVIS (EmaiL Voice Interactive System) is an experimental spoken dialogue system that allows you to access your email by talking to an agent named "Elvis".
Developed at:  AT&T, USA Web-site:  [click here]
Phone #:  Samples: 
Developers:  Marilyn. A. Walker, Diane J. Litman, Candace. A. Kamm and Alicia Abella.


 Higgins
Description:  A spoken system for guidance, information and navigation in 3-dimensional worlds [Swedish spoken]
Developed at:  [CTT, KTH, Stockholm, Sweden] Web-site:  [click here]
Phone #:  Samples: 
Developers:  Jens Edlund, Gabriel Skantze


 How May I Help You?
Description:  This is a call-routing application developed for the AT&T customer service line. The machine understands customers' spoken responses and figures out what service they want, conducting a dialog when necessary to gather further information.
Developed at:  AT&T, USA Web-site:  [click here]
Phone #:  Samples:  [a lot of video samples]
Developers:  Alicia Abella, Tirso Alonso, Allen Gorin, Giuseppe Riccardi and Jerry Wright


 ITSPOKE
Description:  ITSPOKE is a spoken dialogue tutoring systems that allows students to interact with a computer tutor via microphine input.
Developed at:  University of Pittsburgh, USA Web-site:  [click here]
Phone #:  Samples: 
Developers:  Diane Litman, Kate Forbes, Scott Silliman


 Intelligent Procedure Assistant (IPA)
Description:  IPA is a multi-modal spoken dialog system aimed at providing support for astronauts on the International Space Station during the execution of procedural tasks and checklists.
Developed at:  RIALIST Group, RIACS/NASA Ames Research Center Web-site: 
Phone #:  Samples: 
Developers:  Greg Aist, Brad Boven, Steven Phan, Dan Bohus, Ellen Campana, Beth-Ann Hockey, John Dowding, Jim Hieronymous


 Jupiter
Description:  Jupiter is a conversational system that provides up-to-date weather information over the telephone.
Developed at:  MIT, USA Web-site:  [click here]
Phone #:  1-888-573-TALK Samples:  [wav]
Developers: 


 LARRI: A Language-based Agent for Retrieval of Repair Information
Description:  LARRI is a multi-modal spoken dialog system which provides assistance and guidance to F18 aircraft personell during maintenance tasks.
Developed at:  CMU Web-site:  [click here]
Phone #:  Samples:  [movie-1]
Developers:  Dan Bohus, Alexander Rudnicky, Yitao Sun, Rong Zhang, Kevin Lenzo, Alan Black


 Let's Go!
Description:  Spoken dialog system that provides access to bus route and scheduling information in the greater Pittsburgh area
Developed at:  Carnegie Mellon University, USA Web-site:  [click here, USA]
Phone #:  Samples: 
Developers:  Antoine Raux, Dan Bohus, Brian Langner, Alan Black, Maxine Eskenazi


 Mercury
Description:  A telephone-based conversational interface that provides information about flight schedules and pricing, Mercury enables users to book and price complex multi-leg travel itineraries to over 200 cities with the United States and around the world.
Developed at:  MIT, USA Web-site:  [click here]
Phone #:  not publicly available Samples:  [html_sample]
Developers: 


 MovieLine
Description:  This mixed-initiative spoken dialog system provides information about movies in the Pittsburgh area.
Developed at:  Carnegie Mellon University, USA Web-site:  [click here]
Phone #:  1-412-268-1185 (not always up) Samples: 
Developers:  Alex Rudnicky, Paul Constantinides


 NBA Game Update Line
Description:  NBA Game Update Line is a VoiceXML application built on top of the Tellme Platform that allows you to find out scores and statistics for recent NBA games.
Developed at:  CMU, USA Web-site:  [click here]
Phone #:  1-800-555-VXML (id: 52693 pin:6229) Samples: 
Developers:  Stefanie Shriver


 NJFUN
Description:  NJFUN is a spoken dialogue agent that allows users to access information about things to do in New Jersey, via a telephone conversation. NJFUN has served as a testbed for demonstrating the use of Reinforcement Learning for optimizing spoken dialogue management.
Developed at:  AT&T, USA Web-site:  [click here]
Phone #:  Samples: 
Developers:  Satinder Singh, Diane Litman, Michael Kearns, Marilyn Walker


 Natlanco
Description:  Artilligentity is a universal dialogue system concept and prototype. Its language models and dialogue models, that define the system's behaviour, are independent of the software. These models are developed with the Dialogue version of Natlanco's LingBench IDE.
Developed at:  [Natlanco, Belgium] Web-site: 
Phone #:  Samples: 
Developers:  Filip De Brabander and others


 Olga
Description:  Olga is a 3-dimensional animated figure which the user can speak to. She helps the user find and sort information from databases. Olga may also on own initiative, for example, give advice and tips [Swedish spoken].
Developed at:  CID NADA KTH, TMH KTH, Lingvistik SU, SICS, & Nordvis AB Web-site:  [click here]
Phone #:  Samples:  [movie]
Developers: 


 Orion
Description:  Orion is a conversational system that performs off-line tasks and initiates later contact with a user at a pre-negotiated time, to deliver timely information.
Developed at:  MIT, USA Web-site:  [click here]
Phone #:  not publicly available Samples: 
Developers: 


 PED - Planner for Efficient Dialogues
Description:  PED is a dialogue management system that uses a probabilistic nested belief model to choose dialogue strategies.
Developed at:  Web-site:  [click here, USA]
Phone #:  Samples: 
Developers:  Bryan McEleney


 PER
Description:  PER is an automated multi-modal, multi-lingual receptionist that operates at the entrance to CTT. Uses speaker verification to authenticate employees. Built on the ATLAS platform. [Swedish spoken]
Developed at:  CTT, Stockholm Web-site: 
Phone #:  Samples:  [paper-1][paper-2]
Developers:  Håkan Melin, Botond Pakucs, Erik Armerén


 PSA
Description:  PSA is a command and control spoken dialog system which will operate on the Personal Satellite Assistant on the Shuttle and International Space Station.
Developed at:  RIALIST Group, RIACS/NASA Ames Research Center Web-site: 
Phone #:  Samples: 
Developers:  John Dowding, Jim Hieronymous, Beth-Ann Hockey, Greg Aist, Ellen Campana


 Pegasus
Description:  A conversational interface that provides information about flight status, Pegasus enables users to obtain flight status information over a telephone line.
Developed at:  MIT, USA Web-site:  [click here]
Phone #:  1-877-LCS-TALK Samples:  [small html sample]
Developers: 


 Presenter
Description:  This system provides a continuous listening command and control interface to powerpoint presentations. The system is based on the Quartet architecture.
Developed at:  Microsoft Research Web-site:  [click here]
Phone #:  Samples: 
Developers:  Eric Horvitz, Tim Paek


 REA
Description:  REA is an embodied conversational agent that communicates using both verbal and non-verbal modalities, operating in the real-estate domain.
Developed at:  Gesture and Narrative Language, MIT Media Lab Web-site:  [click here]
Phone #:  Samples: 
Developers:  Justine Cassell


 Reading Tutor (project LISTEN)
Description:  This is an automated Reading Tutor that displays stories on a computer screen, and listens to children read aloud. The Reading Tutor intervenes when the reader makes mistakes, gets stuck, clicks for help, or is likely to encounter difficulty.
Developed at:  CMU, USA Web-site:  [click here]
Phone #:  N/A Samples: 
Developers:  Jack Mostow, Greg Aist, Andrew Cuneo, et al.


 SIMON
Description:  SIMON is a commercial spoken dialog system developed by United Airlines to handle call for missing and delayed luggage.
Developed at:  Web-site: 
Phone #:  1-800-221-6903 Samples: 
Developers: 


 SmartKom
Description:  SmartKom is a multimodal dialog system that supports the situated understanding of possibly imprecise, ambiguous or partial multi-modal input and provides a symmetric use of modalities in input and output. There are three different application scenarios of SmartKom with a plethora of applications, including cinema information, electronic programming guide, different types of biometry, and communication services like phone, fax, and email.
Developed at:  Web-site:  [click here]
Phone #:  Samples:  [video]
Developers: 


 TOOT
Description:  TOOT is a spoken dialogue agent that allows users to access train schedules stored on the web via a telephone conversation. TOOT has served as a testbed for evaluating spoken dialogue systems using the PARADISE evaluation framework, for evaluating the utility of adaptive dialogue management, and for exploring prosodic cues to error detection and recovery.
Developed at:  AT&T, USA Web-site:  [click here]
Phone #:  N/A Samples:  [audio] [transcript]
Developers:  Diane Litman, Shimei Pan, Marilyn Walker


 TRAINS-91, TRAINS-93
Description:  Over the course of the TRAINS project, a series of demonstration systems were built. The domains for these systems involved routing and scheduling of freight trains, hence the project name.
Developed at:  Rochester University, USA Web-site:  [click here]
Phone #:  N/A Samples:  [dialog transcripts] [movies]
Developers:  James Allen, Peter Heeman, David Traum


 TRIPS
Description:  TRIPS, The Rochester Interactive Planning System, is an intelligent planning assistant that interacts with its human manager using a combination of natural language and graphical displays (maps, charts, windows, and the like).
Developed at:  Rochester University, USA Web-site:  [click here]
Phone #:  N/A Samples:  [movies]
Developers: 


 USI ApartmentLine
Description:  This is a Universal Speech Interface application. It provides access to information about housing around CMU.
Developed at:  Carnegie Mellon University, USA Web-site:  [click here]
Phone #:  1-412-268-1185 (not always up) Samples: 
Developers:  Roni Rosenfeld, Stefanie Shriver, Jerry Zhu, Arthur Toth, Thomas K. Harris, James Sanders


 USI MovieLine
Description:  This is a Universal Speech Interface application. It provides access to information about movies in the Pittsburgh area.
Developed at:  Carnegie Mellon University, USA Web-site:  [click here]
Phone #:  1-412-268-1185 (not always up) Samples: 
Developers:  Roni Rosenfeld, Stefanie Shriver, Jerry Zhu, Arthur Toth, Thomas K. Harris, James Sanders


 Vera
Description:  Telephone-based taskable agent that can be instructed to deliver messages to a third party and make wake-up calls.
Developed at:  Carnegie Mellon University, USA Web-site:  [click here, USA]
Phone #:  Samples:  [video]
Developers:  Ulas Bardak, Scott Judy, Vasco Pedro, Tal Blum, Jeongwoo Ko, Ryosuke Miyata


 Voyager
Description:  Voyager is a conversational system that can engage in verbal dialogues with users about tourist and travel information for the Greater Boston area. English, Japanese and Italian versions of Voyager have been developed over the years.
Developed at:  MIT, USA Web-site:  [click here]
Phone #:  not publicly available Samples:  [small html sample]
Developers: 


 WAXHOLM
Description:  WAXHOLM gives information on boat traffic in the Stockholm archipelago. A fleet of some twenty boats from the Waxholm company connect about two hundred ports. Different days of the week have different time tables. [Swedish spoken]
Developed at:  TMH, Stockholm, Sweden Web-site:  [click here]
Phone #:  Samples:  [screen-shot]
Developers:  Jonas Beskow, Mats Blomqvist, Rolf Carlson, Kjell Elenius, Björn Granström, Joakim Gustafson, Sheri Hunicut, Niko Ström


 WITAS
Description:  This spoken dialog system controls an autonomous mobile robot helicopter, which can carry out activities such as searching for a object, following a vehicle, flying to a location, and taking off and landing.
Developed at:  CSLI Stanford Web-site:  [click here]
Phone #:  Samples:  [movie-1, movie-2]
Developers:  Oliver Lemon


 WebTalk
Description:  A framework for automatically building spoken dialog systems based on a set of web pages.
Developed at:  [AT&T Research, USA] Web-site:  [click here, USA]
Phone #:  Samples: 
Developers:  Junlan Feng, Srinivas Bangalore



Disclaimer: This list is neither complete, nor a 100% accurate. It merely reflects my knowledge at a certain point in time. Most of the audio samples are either directly linked or were obtained through the web. If there are any copyright issues with them, please let me know and I will take them off immediately. The "Developers" field is probably the most inaccurate one. For additions (aka you feel your system should be here), and/or corrections, please don't hesitate to contact me.