I did a search of all the Xen related SourceForge.net projects and found a list of 63 projects. Many of the projects have no available download which I suppose means that it was not completed (?); however, I found many projects with downloads available for users. The complete list of the projects is here at sf-project-list.odt or sf-projectlist.pdf.
If anyone is using these projects, please add some comments to let other people know about the solutions. Also, I do see that two major projects – Xen ARM and Xen Access Library are included; so my focus is on some of the lesser known projects.