TOTU
It pays user for visiting the posts https://totu.ws/
(developing now)
SIGRATA
It was a marketplace with ready to use IoT solutions, e.g. smart garage door app.
This whole company was based on IP called smablo.com
GETREVE
It is a marketplace with white-label solutions https://getreve.com/
Various Landing Pages
https://constans-abbf2.web.app/