Mindmap + PDF Notebook + Flowchart (was Mindmap Social Pro, then was MindupPro:BigDataManagement) is a fast and efficient mind-mapping app, supporting full keyboard-driven, Vim-style shortcuts.
It is really convenient that there is no need to switch input method to manage mind map by shortcuts (such as fold/unfold, delete, cursor moving, etc.) after inputing Latin, Greek, Russian, Arabic, Syrian, Chinese, Japanese, Korean, Ivrit/Hebrew characters in a thought node and you can continue to create or modify node by shortcut i/a/o/A/O and input characters with your input method because there is no change on your input method during the procedure of operating and inputing. We believe that this is the way to improve people's productivity. MindupPro:BigDataManagement can also present your contents just like keynote or powerpoint but in mind map style (try to press ? after running the app).
Updated on May 22 2020
Note: While the software is classified as free, it offers in-App Purchases.