Presto's Presentation Timer is a simple countdown timer that sits in the corner of the screen and lets both the presenter and audience know how much time is left for the presentation. You may configure the time, opacity, border, and font from a right-click menu. Moreover, the timer can be programmed to stay hidden until a certain time is left, or become more and more opaque as time runs out. The timer always stays on top of whatever applications are running.
Version build 1.1.2444.30417 automatically saves settings for future use, new option On Timeout -> Restart, automatically restarts timer when it expires, supports user-specified timer values, and support for playing custom sound (.wav) when timer expires.