Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Loxi - Easily add an events calendar to any website.
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
Whenever - Casual calendar app for iOS
Workflowy - A better way to organize your mind.
Future - Calendar events around the clock