Wieldy is a to-do list manager that is based on the principles of GTD (Getting Things Done). It allows you to manage your to-dos in a simple but effective way. To-dos can be created as thoughts and actions, which can then be assigned to the Next Action, Today, or Someday categories. Tasks can also be scheduled, as well as linked to a project or simply put on hold. It also allows you to manage your contacts. Also available as a portable version.