.Net hosting
Free .net host, maybe for testing? I didnt test it yet, but if you ar in need..
http://www.freewebdot.com/


If you want to build custom controls with C# but you don't know where to start, or you are intimidated by the huge amount of information that needs to be absorbed, then this book is for you. This friendly tutorial is based on numerous examples with real-world applicability, and includes a case study featuring the development of a fully functional PieChart control.Showing you how to use the free Visual C# 2005 Express Edition environment to develop your controls, GDI+ Custom Controls with Visual C# 2005 will teach you how to create professional, reusable custom controls for your desktop applications in no time.
http://www.packtpub.com/files/1604_CustomControls_SampleChapter.pdf

ref: gotdotnet

UML Visual Paradigm Suite 2.3
http://www.visual-paradigm.com/download/download.jsp?product=sdevs&edition=ce