Atlas Icons provides over 2,700 free icons available in SVG format. The icons are organized into categories like arrows, audio, communication, data, ecology, and more. They are designed to be consistent in style and can be downloaded individually or as a complete set. The icons are open-source and ready to use in applications like Figma, React, and Flutter. Atlas Icons aims to offer an extensive, categorized collection of high-quality icons that can be used freely in both personal and commercial projects.