Hive - Seamless project management and collaboration for your team.
GoodNotes - GoodNotes lets you take notes and annotate PDF documents.
ePUB EBook Reader Supreader.com - ePUB EBook Reader Supreader.
Notepad by Braden Farmer - Notepad is an app by Braden Farmer that offers features that let you write and save plain as well as rich text notes by using HTML or Markdown.
Word Count Notes - Word Count Notes app is a digital word counter app that provides features through which users can count words of desired content with a single tap.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.