GStreamer [SEP] license
base to create many types of multimedia applications such as video editors, transcoders, streaming media broadcasters and media players.
It is designed to work on a variety of operating systems, e.g. Linux kernel-based operating systems, the BSDs, OpenSolaris, Android, macOS, iOS, Windows, OS/400.
GStreamer is free and open-source software subject to the terms of the GNU Lesser General Public License (LGPL) and is being hosted at freedesktop.org.
Distribution and adoption.
The GNOME desktop environment, a
new voice. It is distributed under a free software license similar to the MIT License.
Festvox is a suite of tools by Alan W. Black and Kevin Lenzo for building synthetic voices for Festival. It includes a step-by-step tutorial with examples in document called "Building Synthetic Voices".
Flite.
Flite is a small run-time speech synthesis engine developed at Carnegie Mellon University, derived from both Festival and Festvox.
Linux compatibility.
There is a Festival plug-in for GStreamer.