Native Unicode application (Windows, OS X, iOS, and Linux).
Five document types (accounts, notes, tasks, events, contacts).
Creole markup (subset).
State-dependent icon color for tasks and events.
Multi-device sync with 'Zero-Knowledge' privacy.
Multiple individually password-protected databases.
Import/export using standard formats and from Outlook.
Extremely fast and low on system resources.
And some users say it's very addictive.