Trello + is a Chrome add-on designed to enhance the functionality and visual appeal of Trello boards. This tool focuses on improving the styles of boards, allowing users to highlight important items using color codes, with options to start with "#" or "!!" and "!!!". Additionally, it optimizes the display of small columns when titles contain only a single character, making board management more efficient.

Another key feature of Trello + is its ability to automatically convert URLs into clickable links, streamlining the process of adding resources to tasks. The add-on also supports markdown formatting, giving users the flexibility to present information clearly and effectively. Overall, Trello + aims to provide users with a more visually appealing and functional Trello experience.