GraphTools is an animation utility addon designed to streamline work in the Graph Editor. It provides tools for copying, pasting, and managing F-curves across different properties. The SmartKeys feature includes a cleanup function that removes unnecessary keyframes without altering the underlying animation sequence. The addon's CopyGraph tool allows users to copy the easing shape of an F-curve and apply it to other channels or specific keyframe segments, preserving their original start and end values. Additionally, a built-in preset library includes 24 common easing patterns that can be applied directly to keyframe selections.