libview is a collection of widgets under the MIT license that we developed at VMware while working on Workstation 5. We felt they were general purpose enough to have value to the community. We have benefitted a lot from open source, and felt it was time to make a genuine effort to give back.
Our intention is for the libview SourceForge project to be the one place where these widgets will be developed and maintained. We will not be developing them in-house and pushing them out to the SVN repository. What you see on SourceForge SVN is what we're using at VMware. We will be adding more widgets over time to libview as we write them.
Most of the widgets are written in C++ for gtkmm. While this does limit the usefulness to many projects, the projects are free to rewrite them in C and use them.