Action Lists
Action Lists is a task manager for the iPhone, iPod touch and iPad based on the Getting Things Done® system popularized by David Allen. Action Lists harnesses the power of the GTD® system with an easy to use interface that makes it fast to access the information you need when you need it. With Action Lists, your GTD® lists are literally at your fingertips.
Benjamin
Benjamin is a task manager for the iPhone and iPod touch based on the FranklinCovey® system of time management. Built specifically to help replace your heavy Franklin Planner, Benjamin stores your master task list, daily task lists, daily notes, and projects for easy access while you're on the go.
Listmaker
Listmaker is a simple list manager for the iPhone and iPod touch that synchronizes to the web. Use Listmaker to store to do lists, grocery lists, travel checklists, or gift ideas. Enter a list and synchronize it to the web to share with others, or enter lists online and sync them back to your iPhone or iPod Touch. Since your lists are synchronized to the web you'll still have access to your data, even if your phone is lost or stolen.