From 4 Neurons
Analogue Vista Clock is an outstanding quality alarm clock for your desktop. This awesome clock is a desktop extension - it will stay on your desktop ignoring all mouse and keyboard input, so it won't interfere with any other application. The communication with the clock, including changing the size, position, transparency level, alarm hour and more, is done using clock's tray icon.
Analogue Vista Clock is fully configurable, it allows you to change its appearance - it comes with six superb Vista-look skins, but registered users can download more or make their own skins! It lets you choose from 5 built-in alarm sounds, but you can use it to play any file you want or even randomly play sound files from selected folder/directory. You can define which days of the week alarm should be played. Furthermore, if the alarm is set and the clock is running, it will wake up the computer if it is hibernated or in standby mode