There are many alternatives to eSpeak for Linux if you are looking for a replacement. The best Linux alternative is Gespeaker, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to eSpeak and 11 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to eSpeak are VoiceOverMaker (Free), Intelligent Speaker (Freemium), svox pico engine (Free, Open Source) and Fala (Free, Open Source).
Automatically create natural voice overs for your videos. Create your own voice overs from your text. A natural sounding voice is automatically generated for your videos. You are also able to create only natural sounding voices and export them.
A backend for gSpeech, also usable in media players. The technology has been purchased by a German company for use in BMW automobiles for text to speech, as well. It is also used for GooglePlay. The open source libraries are still available, however.
Fala - A simple text reader is an open source application. A simple software that speaks a text. You can type the text or appoint a file. Fala is just a frontend to festival. Its designed for GNOME, but if you have gtk, pyhton and festival you are able to run it.
KMouth is a program which enables persons that cannot speak to let their computer speak, e.g. mute people or people who have lost their voice. It has a text input field and speaks the sentences that you enter. It also has support for user defined phrasebooks.
Select and Speak uses iSpeech's human-quality text-to-speech (TTS) to read any selected text in the browser. It includes many iSpeech text to speech voices in different languages. You can configure the voice and speed options by changing the settings on the options page.