Allegro Data Solutions
For many years, Allegro Data Solutions sold several turnkey applications to other developers and clients who could not afford custom work. These included timeclock and calendar apps, as well as a widely used booking and invoicing solution for professional pet groomers. Unfortunately, the company that provided the shopping cart services for the transactions has raised its fees to an unreasonable rate, so they are no longer being sold online.
If you are a U.S. client interested in one of these applications, you can purchase them directly from Allegro Data Solutions. Or you can hire Allegro Data Solutions to adapt one of them to suit your needs, to reduce the cost of custom development. (Please inquire via e-mail by clicking the Contact link above).