We are working on a new webpage to promote Kontact as a standalone product. We've been working with the Promo team (T9243) and the VDG (T9299) to get it ready, but of course there's still a lot of room for improving the looks and the content.
The repo currently lives here: https://cgit.kde.org/scratch/dvratil/kontact-kde-org.git/
Live version preview: http://kontact.dvratil.cz