Name: UXPin
Function: Prototyping | Wireframing | UI design
Best For: High-Fidelity | True-to-life Prototypes
Basic Pricing: Free
Link: uxpin.com

Name: Adobe XD
Function: Prototyping | Wireframing | UI design
Best For: Advanced Editing Tools
Basic Pricing: Free
Link: Adobe XD

Name: Framer
Function: Prototyping | Wireframing | UI design
Best For: Rapid Prototyping
Basic Pricing: Free
Link: framer.com

Name: InVision
Function: Prototyping | Wireframing | UI design
Best For: Workflow
Basic Pricing: Free
Link: invision.com

Name: Justinmind
Function: Prototyping | Wireframing | UI design
Best For: UI Library & Templates
Basic Pricing: Free
Link: justinmind.com