Monorepo tools like Bazel, Nx, Pants, Turborepo, and Gradle are integral for managing large-scale codebases by offering features such as incremental builds, caching, and dependency graph analysis, which help improve CI/CD efficiency and developer productivity. Each tool has its unique strengths and targets different ecosystems: Bazel is powerful for complex, multi-language projects, while Nx and Turborepo cater to JavaScript/TypeScript environments with advanced caching and task orchestration. Gradle excels in managing multi-project builds, especially within JVM-heavy stacks, while Pants offers performance optimizations for polyglot codebases. These tools help streamline workflows by selectively running tasks based on changes, thereby reducing build times and improving team collaboration. However, adopting monorepo tools comes with challenges, such as infrastructure complexity and the need for specialized support, which may deter smaller teams. Ultimately, the choice of a monorepo tool should align with a team's specific language ecosystem, CI/CD requirements, and workflow preferences to maximize productivity while minimizing overhead.