MindMapVault FOSS

MindMapVault FOSS is a privacy-first mind mapping app with zero-knowledge
end-to-end encryption, and it is offline-only: there is no account, no
server, and no telemetry.

This snap is strictly confined and declares no network interface at all, so
the local-only promise is enforced by the system rather than taken on trust.
Your vaults are encrypted on this device and never leave it.

Import and export FreeMind, FreePlane, WiseMapping, XMind, Markdown and the
app's own lossless .mmvault format.