These are some key features of the framework itself:
Modular and NLayered architecture
Multi-tenancy
Dependency Injection
Domain Driven Design
Unit of work implementation
Flexible Localization system
Automatic data filters
Audit logging
Setting management
Menu management
Authorization
Exception handling
Validation
Logging
Event bus for domain events
Auto-creating Web API layer for Application Services
Auto-creating Javascript proxy layer to use Web API layer
Javascript helper methods for ajax, notifications, message boxes, making UI busy...
Easily working with embedded resources
Useful extension and helper methods