WuFoo is an online form builder tool that provides an interactive and user-friendly interface for its users. It avails a wide variety of plans ranging from free to paid, on a monthly basis. Users can choose from 300+ different templates, create custom rules using logic and accept payments on their forms. It integrates with Mailchimp and Twitter, as well as, payment systems such as Authorize.net and PayPal. It allows respondents to fill forms via mobile phones. Its additional features include real-time reporting and a REST API to easily embed forms onto websites.