Modular / Extensible
Theme-able / Customizable
Zero Cost
Implementation Language (e.g. PHP vs. Python)
Ability to Like postings / Provide Feedback
Modern UI
Flexible/customizable user permissioning
Organization of users into groups (role-based access control)
Integration with single-signon solutions (e.g. auth0)
Flexible user account management (self-service for resend password, etc.)
Preservation for user anonymity (e.g. display names)
Support for Graviton's & personal avatars
Under active development
Strong user community
Open source
Private messaging (with ability to mute/ignore others)
User involvement tracking (features unlock with increased participation)