The Portland API Hack Day was a successful event where developers showcased their projects and innovations in the field of APIs and software development. A tool called Planrrr took the grand prize, which is an event management platform that allows users to send personalized invitations to guests via multiple channels such as SMS, email, or Facebook message. Another notable project was Visual Resume, a LinkedIn data visualization tool that combines Gantt charts with real-time updates. The Twilio team also presented their plan to integrate click-to-call functionality into their platform, which is expected to enhance user experience. Overall, the event highlighted innovative ideas and projects from developers who are shaping the future of software development and API integration.