Are you looking for a Free WYSIWYG website editor similar to Frontpage? Then I would certainly recommend Microsoft Expression Web 4.
Microsoft Expression Web 4
Expression Web was a free tool previously created, maintained and distributed by Microsoft. Microsoft no longer supports or maintains Microsoft Expression however it is still available and works perfectly well on Windows 10. Although personally I am an Adobe Dreamweaver user, if you are looking for a free alternative, you will struggle to find one better than this.
WYSIWYG Editor, Code Editor or Split View
Depending on your skill set of preference, you can work in WYSIWYG view (no code knowledge needed), code view or in split mode. The screenshot above represents split view.
History of Expression Web
Originally this HTML Editor and web design tool was available to purchase. However in 2012 Microsoft took the decision to discontinue the product and additionally decided to make it a free of charge product. Despite the latest version (Microsoft Expression 4) being 8 years old, it still works perfectly well in the latest version of Windows 10.
How long Expression Web 4 will continue to work in Windows is unknown. However, I would expect it to continue working at least for the next few years unless there are any fundamental changes to the Windows OS.
Read more on the history of Expression Web.
If you know of any other great and free HTML editors, please comment below or get in touch.