RunaBook is described as 'What is RunaBook?' and is an app in the Education & Reference category. There are more than 100 alternatives to RunaBook for a variety of platforms, including Windows, Mac, Online / Web-based, Android and iPhone. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Notion. Other great apps like RunaBook are Google Keep (Free), Evernote (Freemium), Simplenote (Free, Open Source) and CherryTree (Free, Open Source).
"Ultra Recall is personal information, knowledge, and document organizer software for Microsoft Windows. * Capture documents, web pages, notes, and emails from almost any application, with automatic capture of content, text, and images.
Memrify is a free multiplatform secure place for your all of your personal and collective memories. It is built on a strong filtering system, so your memories are retrieved in no time. Give it a try, you can log in easily with facebook or create a new account in 15 seconds.
Hypernotes is a way to store ideas in the same way that you think them. Notes can be created with images and text, organized in a tree structure and connected with internal hyperlinks. Written in Java, so it works wherever you go. (Requires Java 1.6)
USticker is free of charge version of "MakerX" app. USticker is notebook app for your iPhone or iPad with set of tools for organizing. The app lets you make quick notes with sketch/photo-sketch and categorize ones with special very efficient markers for organizing.