Windows Journal, Tree Notes, Prizmo, Image To Text, PDFify, Journaler, Hypernotes, AK Notepad, Pear Note, Linked Notes, MindRaider, Natara Bonsai, Journler, Glom, ZuluPad, Text UP, Foliaro, Smart Scanner, SyncNotes, Xinote, abcNotes, Pinoteo, AcquireNotes, Text-R, Notespark, Catch Notes, ActionOutline, Reddynote, OnlineNotes, Deep Notes, TextDetective, OCR Terminal, ProjectBook, Notefrog, Notefish, Upvise, ZoomReader, TexNotes, OnePunch Notes, Surreal ToDo are some alternatives to Outline Knowledge Organizer.