The Cainteoir Engine is a library for reading and recording different document formats (ePub, HTML, MHT, RTF, email, and others) to various audio output formats (such as PulseAudio, WAV, and Ogg/Vorbis). It also provides the following command-line tools: cainteoir, a front-end to the Cainteoir text-to-speech library; metadata, which extracts metadata from documents to RDF tuples; and tagcloud, which generates tag clouds and tag cloud data.
Speech synthesis for Asterisk using MS Translator text-to-speech service to synthesize speech and play it back to the user. It supports a variety of languages, local caching of voice data, and 8kHz or 16kHz sample rates to provide the best possible sound quality along with the use of wideband codecs.
Audible TTS reads text aloud from other apps, the clipboard, or from text files. It can get text from applications such as Feedme or K9-Mail, the clipboard (using Copy and Paste), or from files on the MicroSD card. It also reads each sentence using the proper language and voice in mixed texts, without having to select it manually. You must have installed a voice synthesizer (such as PICO or SVOX) and voices for the languages to be used. It currently supports German, English, Spanish, French, Italian, Dutch, Polish, Portuguese, Turkish, Russian, Arabic, Korean, Chinese, and Japanese.
eSpeak for Android is a port of the eSpeak Text-to-Speech synthesiser to Android, supporting 75 languages and accents. It is based on the eyes-free version, but with improved language selection and language name display, support for accents and special characters, improved handling of speech rate and pitch, support for MIPS-based devices, and improved support for SSML.