XMind is pretty good personal cross-platform tool for mind-mapping for Linux, Windows, macOS, Android, and iOS. One tiny shortcoming: Cyclic graph cannot be cr

XMind is pretty good personal cross-platform tool for mind-mapping for Linux, Windows, macOS, Android, and iOS. One tiny shortcoming: Cyclic graph cannot be create (view is ok) on iOS platform but can be done on other platforms. Acyclic is a given. One great feature is when it gets too big, graft-and-paste to a separate document is available. Collaboration between devices of same account is excellent. Disclaimer: not affiliated with XMind. https://XMind.net https://XMind.net Some graph example on malware, anti-virus, and Trojans not created by me: https://www.xmind.net/m/VipY/ https://www.xmind.net/m/VipY/