Sell any customized services and products with ease by creating your own flexible cost calculator or payment method (even with a subscription!) On your PHP website.

WP Cost Estimation & Payment Forms Builder is a WordPress plugin that creates its own flat and responsive cost estimator or calculation form on your WordPress website.

Zigaform - PHP Calculator & Cost Estimation Form Builder is a powerful and flexible PHP application that enables you to create advanced cost estimation forms in just a few steps using an intuitive drag-and-drop builder.