Retool is a low-code tool for building applications with drag-and-drop components and JavaScript customizations, allowing users to create customized interfaces without extensive coding knowledge. It connects to diverse data sources, including relational databases and GraphQL APIs, providing a quick and easy way to display data in meaningful ways. The author has integrated Retool with Neo4j's graph database using GraphQL as the common connector, enabling the creation of a custom application that can retrieve and analyze Twitter data from Neo4j. The application includes features such as statistics on followers and popular influencers, recommendations for users to follow, and a newsfeed showcasing tweets from similar users. With its user-friendly interface and flexibility, Retool provides a viable option for developers, analysts, and others to build custom applications without extensive coding knowledge.