Noteshelf is recommended for students, educators, professionals, and anyone who values organized and customizable digital note-taking. It's particularly ideal for users who need to manage extensive notes across different formats and prefer synchronization across multiple devices.
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.
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
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.
Documents by Readdle - A central hub for all your files.
RedNotebook - RedNotebook is a software that format, tag and search entries and add pictures, links and customizable templates, spell check notes, and export to plain text, HTML, Latex or PDF.
Mac OS X Prefs Editor - Edit preferences of any application. Like the 'defaults' command in Terminal.