WriteMaps – Create, Share and Edit SiteMaps Online
http://www.writemaps.com/

WriteMaps is a free web-based tool that allows you to create, edit, and share sitemaps online. As a WriteMaps user, you and your team will be able to build and access your sitemaps from anywhere, without having to rely on proprietary desktop apps and static files. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.