[frik]

The migration tool that came with Visual Studio 2002-2008 is a licensed product from a third party company (a "lite" version actually). The tool was demonstrated (and this fact mentioned) in some Channel9 videos (Microsoft website) about ten years ago.

Word and Frontpage used the same COM code based on trident (IE). Frontpage is dead, the successor Expression Web used a new HTML engine and is dead as well. The second Frontpage successor that still used the trident engine was Sharepoint Designer 2007. Version 2010+ lacks most layout features as the old Frontpage based code generated ugly HTML4. Word 2010 (and probably also 2013) still generates (ugly) HTML4 with inlined VML (graphics, WordArt) based on older trident.

And there is also InfoPath 2003-2013 (dead as of 2014) that is based on a modified Frontpage/trident code. It uses CAB based archive format to store XML and XSD files that resemble the user defined form data. The InfoPath WebForms are generated server side based on the XML stylesheet and XML data. Microsoft is working on a successor to InfoPath merged with other Office products and mobile compatible.