Repository hosting tools play a pivotal role in fueling open source development by providing essential platforms for collaboration, version control, and community engagement. Tools like GitHub and GitLab streamline code sharing, enabling developers to easily contribute to projects, track changes, and manage issues. These platforms foster transparency and inclusivity, allowing contributors from diverse backgrounds to participate and innovate. Additionally, features like pull requests and code reviews enhance code quality and ensure best practices. By facilitating seamless communication and collaboration, repository hosting tools empower developers to build robust open source solutions, driving technological advancement and fostering a vibrant community.