This website is the shelf. It names each product, gives it a page, and points to the domain where that product actually runs.
The clock, Old Fashioned Alarm, runs on this site. The other products are separate businesses on their own domains, including MyOnlineInvoice, MarineGrib, LocalLock, Watching Over Baby, TradeCalc Pro, Wakegrind, and Profit.co.uk, and LiteVide.
Questions about the catalogue go through the contact page. Questions about a paid product go to that product’s own site.