GoodNotes - GoodNotes lets you take notes and annotate PDF documents.
Day One - A simple journal application for the Mac, iPhone, and iPad. AboutTo learn more about Day One, see these two excellent reviews . PublishPublish is not available in Day One 2.
MrWriter - Notetaking and blackboard replacement application. Inspired by Xournal.
Journalistic - A simple, yet powerful micro journaling app
Notezilla - Colorful & powerful sticky notes app for Windows & Phones.
Journaly - The customisable journal app