From Dan's Kingdom:
DPSF (Dynamic Particle System Framework) is a framework for creating custom particle systems in XNA, to be used on Windows, the Xbox 360, Windows Phone 7, and the Zune. The framework is contained in a single dynamic link library (dll) file, and allows users to create their own unique particle systems quickly and easily by building off of the provided framework. Help documents, tutorials, and demo source code is provided to make learning how to use DPSF easy.
What's new in this version:
Version 2.4.1 fixes a blocking bug that prevented DPSF from running on the Xbox.