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..

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...

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...