This API exposes the so called driven properties, which are aimed to map any type of node properties (i.e. title, body, taxonomy, CCK fields, workflow, etc).
This module provides an input filter to display check-boxes that can be used as a task list. These check-boxes can be added using special markup when editing node content. When viewing node content, each task can be marked as "done" by clicking on the check-box to toggle it.