Groove actually still exists, though it's gone through a bunch of branding and strategy contortions:<p>Groove 2006 -> Microsoft Office Groove 2007 -> SharePoint Workspace 2010 -> SkyDrive Pro -> OneDrive for Business (the current product)
My current employer has a bunch of sites like that as well - abandoned projects from years ago that have since been replaced by new things, but the website files are still there and the virtualhost block for it hasn't been removed.<p>The scary part is that these sites still manage to make a few sales each year.