It's probably the best technology that the early 90s had to offer. FTA: gnuspeec...

It's probably the best technology that the early 90s had to offer.

FTA:

    gnuspeech is currently fully available as a
    NextSTEP 3.x version in the SVN repository
    along with the Gnu/Linux/GNUStep version,
    which is incomplete though functional

Wikipedia[1]:

    3.0 September 8, 1992
    3.1 May 25, 1993
    3.2 October 1993
    3.3 February 1995

[1] https://en.wikipedia.org/wiki/NeXTSTEP#Release_history