$ apt-cache search -n speech-dispatcher
cl-speech-dispatcher - Common Lisp interface to Speech Dispatcher
speech-dispatcher - Common interface to speech synthesizers
speech-dispatcher-doc-cs - Speech Dispatcher documentation in Czech
speech-dispatcher-festival - Festival support for Speech Dispatcher

$ apt-cache search speechd
libspeechd-dev - Speech Dispatcher: Development libraries and header files
libspeechd2 - Speech Dispatcher: Shared libraries
python-speechd - Python interface to Speech Dispatcher
speechd-el - Emacs speech client using Speech Dispatcher
speechd-el-doc-cs - speechd-el documentation in Czech

$ apt-cache search -n flite
brltty-flite - Access software for a blind person using a braille display
eflite - Festival-Lite based emacspeak speech server
flite - A small run-time speech synthesis engine
flite1-dev - A small run-time speech synthesis engine - static libraries
libflite1 - a small run-time speech synthesis engine - shared libraries

$ apt-cache search -n espeak
espeak - A multi-lingual software speech synthesizer
espeak-data - A multi-lingual software speech synthesizer: speech data files
libespeak-dev - A multi-lingual software speech synthesizer: development files
libespeak1 - A multi-lingual software speech synthesizer: shared library
python-codespeak-lib - The pylib library containing py.test, greenlets and other niceties

$ apt-cache search -n festival
festival - general multi-lingual speech synthesis system
festival-czech - Czech support for Festival speech synthesis system
festival-dev - development kit for the Festival speech synthesis system
festival-doc - Documentation for Festival
festival-freebsoft-utils - Festival extensions and utilities
festival-gaim - gaim plugin to hear incoming messages using voice synthesis
festival-hi - Festival text to speech synthesizer for Hindi
festival-mr - Festival text to speech synthesizer for Marathi
festival-te - Festival text to speech synthesizer for Telugu (te) language
festvox-hi-nsk - Hindi male speaker for Festival
festvox-kallpc16k - American English male speaker for festival, 16khz sample rate
festvox-kallpc8k - American English male speaker for festival, 8khz sample rate
festvox-kdlpc16k - American English male speaker for festival, 16khz sample rate
festvox-kdlpc8k - American English male speaker for festival, 8khz sample rate
festvox-mr-nsk - Marathi male speaker for Festival
festvox-suopuhe-lj - Finnish female speaker for Festival
festvox-suopuhe-mv - Finnish male speaker for festival
festvox-te-nsk - Telugu (te) male speaker for Festival
pidgin-festival - pidgin plugin to hear incoming messages using voice synthesis
speech-dispatcher-festival - Festival support for Speech Dispatcher
festvox-don - minimal British English male speaker for festival
festvox-rablpc16k - British English male speaker for festival, 16khz sample rate
festvox-rablpc8k - British English male speaker for festival, 8khz sample rate