SpeakTime is an extension and control panel which allows your Mac to speak a user-specified phrase on start up, speak the time at different intervals, and announce any number of custom phrases at user-specified times and dates.
You have the usual selection of Mac voices to use for the various program functions. Please read the documentation for more information.
SpeakTime requires Speech Manager. It will run on PPC macs with MAC OS 8.0 or greater installed. On systems with a language other than english, you will need to use the optional "English Text To Speech" installer found on your system software CD.