StarUML - StarUML
IBM Journey Designer - IBM Journey Designer is an advanced-level tool now provided by Acoustic that is used to improve the journey of the customers and provides you with the suggestion to minimize the bottleneck situations in a customer’s journey.
draw.io - Online diagramming application
InMoment - Experience Management
UMLet - UMLet - Free UML Tool for Fast UML Diagrams
SuiteCX - Customer Experience Mapping Solutions