QuickSchools.com has implemented a Click-to-Call application that allows customers to request a call from the website, using Twilio's SaaS API. This application is designed to be easy to deploy and use, as stated by QuickSchools' blog post, which praises Twilio for its simplicity in implementing such functionality on their website. The company also mentions other services they are using, including Basecamp, but highlights Twilio's role in enabling this innovative feature. Additionally, Twilio offers various resources, including API documentation, SDKs, and tutorials, to help developers build similar applications.