Brush Manager is an add-on that provides a system for creating custom brushes, storing them in dedicated files, and organizing them into distinct categories. It offers tools for applying custom themed icons to both new and existing brushes to maintain a unified interface. The tool leverages the 3DN BIP library to ensure rapid loading of brush preview images during use. Additionally, it features an operator for managing favorite brushes, allowing users to save favorite lists as new categories or generate quick preset groups that load instantly into the active workspace.