Underscores is a starter theme framework designed for developers who want to create custom themes efficiently. It serves as a clean, minimal foundation that can be fully customized, avoiding the constraints of pre-built themes. This tool is ideal for those with coding experience who prefer to build themes tailored to specific projects rather than modifying existing ones.

• Lean, well-commented code: The framework includes modern HTML5 templates and CSS that are minimal and clearly documented, reducing clutter and making it easier to understand and modify.
• Custom template tags and functions: It provides reusable template tags in separate files to keep templates clean and prevent code duplication, along with helper functions to improve the theming workflow.
• Responsive navigation: A JavaScript file enables toggled dropdown menus for small screens, such as mobile devices, allowing for easy customization with CSS.
• Sample layouts and CSS: Two sample CSS layouts for sidebars are included, along with smartly organized starter CSS to help quickly implement design ideas.
• Optional features: It offers an optional custom header implementation and a helpful 404 template, adding flexibility without imposing unnecessary defaults.