Mini is an application server and was designed to be simple and have a small footprint. It has the features you need to be able to develop small webapplications that you want to deploy on a machine with modest hardware. Mini is implemented as a windows service and runs under windows 2000/XP/Vista.

Mini is developed by Toni Thomsson and is still under heavy development, far from finnished, especially the documentation, wich for the moment is quite sparse. Still, it has been successfully used in a number of projects already. So if you are looking for something like Mini and you're not afraid of "The bleeding edge", try it out!