SpeakTime — a utility that speaks a specified phrase at start-up time or at date intervals — now runs under Mac OS 9.x and Mac OS X as a single background application as of version 2.0.
SpeakTime can be used to make your Mac “speak” the time at regular intervals and make user defined announcements, in a voice and at a volume of your choice.
SpeakTime 2.0 is a US$15 shareware product. You can download it (334k) at the Muon Software Web site. Carbon library and Speech Manager (both included by default with the system) are required.