Available on Android, iOS, Windows Phone, Nokia Devices, PC, and Web
Some Great Resources for all things Evernote:
1. http://office.microsoft.com/en-us/onenote/ Official Website
2. http://www.howtogeek.com/howto/22125/beginner-geek-getting-started-with-onenote-2010/ Beginner's Guide
This is a running list! If you have any sources you'd like to add, please share it below and I will add it to the list!