Trello Folds (Kanban for Trello) is a Chrome extension developed by Magnus Nord. This free add-on falls under the Browsers category, specifically the Add-ons & Tools subcategory. The extension enhances Trello boards by adding foldable lists and sections, as well as per list Work in Progress (WiP) limits, transforming your Trello board into a Kanban system.

With Trello Folds, you can combine lists and share WiP limits between them. For example, you can combine "development.in progress" and "development.done" lists into one "development" list with two sublists. You can easily fold and expand lists by clicking the "x" in the top right corner or anywhere on the folded list. Additionally, the extension allows you to turn cards into collapsible sections using a selected character repeated multiple times.

Furthermore, Trello Folds enables you to add WiP limits to lists by adding them in brackets to the list title. For instance, you can set a limit of 5 for a list by titling it "My List [5]". The extension also remembers the view state for boards and offers various visualization options for lists that exceed their WiP limits.

Trello Folds provides a convenient popup for configuration and welcomes feedback and suggestions from users. It has recently made updates to improve compatibility with changes in Trello's DOM/styles and enhance board initialization and loading reliability.

Overall, Trello Folds (Kanban for Trello) is a useful Chrome extension for Trello users who want to add foldable lists, collapsible sections, and WiP limits to their boards, transforming them into a Kanban system.