We usually refer to programs that are relatively small or always run in the background as "gadgets" and "widgets". These might serve a number of purposes, e.g. to provide a quick-launch dock or always keep you informed about the weather.
Bushin SOFTWARE, Igor "Igogo" Bushin
Juan Pablo Ibañez
Jan van den Borst Software Development
Igor "Igogo" Bushin
Kristoffer Nes Langemyhr aka. xenox
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Stardock Software, Inc.