OmniFocus is a task management app for the iPhone. Omnifocus helps you get things done. OmniFocus works great for everyday life and flourishes when used by people who have a lot of tasks to manage at once. Capture tasks anywhere by entering text, taking a picture or making a voice recording. OmniFocus can sync with your Mac via Mobile Me or WebDAV.

Cost: $19.99
App Store Link
Developer Website
Support Website