Figma is a collaborative design platform that helps design and development teams build great products together. It offers features for design, prototyping, collaboration, and code generation. 


Figma: The Collaborative Interface Design Tool

draw.io is a free online diagram software that can be used to create flowcharts, network diagrams, UML diagrams, ER diagrams, database schemas, BPMN diagrams, circuit diagrams, and more. It can also import .vsdx, Gliffy™ and Lucidchart™ files. 
