FreeTTS is an open source speech synthesis system written entirely in the Java programming language.
FreeTTS is an implementation of Sun's Java Speech API.
Benchmarks conducted by Sun in 2002 on Solaris showed that FreeTTS ran two to three times faster than Flite at the time.
[1] As of June 2019, the newest version of that project originates from April 2017.
Intensive development finished in March 2009 with release 1.2.2.