Code Review Tools are software applications designed to help developers examine and improve each other's code. These tools facilitate collaboration by allowing team members to comment on code changes, suggest improvements, and track issues. They often integrate with version control systems like Git to streamline the review process. Using Code Review Tools can enhance code quality and maintainability by ensuring that multiple eyes review changes before they are merged into the main codebase. Popular examples include GitHub, GitLab, and Bitbucket, which provide features like inline comments, approval workflows, and automated checks to support effective code reviews.