Center for Spoken Language Understanding: Oregon Graduate Institute of Science and Technology has created a public resource for experimenters. Download trial software for speech recognizers.
comp.speech WWW site: Provides a range of information on speech technology, including speech synthesis, speech recognition, speech coding, and related material. Pages look a little old (1997) but a very wide range of FAQ here. Algorithm for building simple recognizers.
Dictation Without Wires or Monitor: Graduate student thesis which may give ideas for difficult environments. Mostly in German, but there is also an English page (click flag). Approach develops a little bit of intelligence between speech recognition and text to speech engine.
IDIAP Speech Processing Group: Research and development of recognition and understanding techniques for realistic speaking styles and acoustic conditions, as well as speaker verification and identification techniques.
Museum of Speech Analysis and Synthesis: Pictures of early voice synthesizors hosted by UCSC - site seems always under construction.
Sautrela Project: Open source speech recognition framework developed in Java. News, documentation, downloads, and an online a demo.
Speech Analysis: A detailed paper describing some of the technology of speech recognition.
Speech Informatics Group: Main research directions are speech recognition/understanding, methodology of speech dialogue systems, applied systems, hidden Markov algorithms.
Speech Language Processing Professional Society: This site acts as a coordinating place for meetings and keeps large database about research in the field. Professional name - COCOSDA.
SPIRIT Speech Technologies: Has advanced software algorithms for speech compression, enhancement, recognition and speaker identification (i.e., voice recognition).
Text-to-Speech processes and timeframe in DIPLOMAT: This is an article describing the rapid-deployment Text-to-Speech processes and development timeframe used in the DIPLOMAT System.
Torch Library: A library in C++ for developing Open Source speech and machine learning applications. The code is under the Gnu Public License.
VOICEBOX: Speech Processing Toolbox for MATLAB: A voice processing toolbox for Matlab, very useful for prototyping algorithms and has routines to do most of the basic useful tasks in speech.