The following are resources freely available to researchers:
EXMARaLDA (Extensible Markup Language for Discourse Annotation). A project based at the University of Hamburg.
Festival (Speech Synthesis System) Centre for Speech Technology Research, University of Edinburgh.
FestVox This project is part of the work at Carnegie Mellon University’s speech group aimed at advancing the state of Speech Synthesis.
PRAAT An audio analysis tool, principally aimed at phonetics research, but widely applicable to all sorts of acoustic analyses.