Smaply - Online tool for customer journey maps, personas and stakeholder maps. Try for free. Best hub for customer experience insights. Great customer support.
draw.io - Online diagramming application
Pointillist - Pointillist is a customer journey analytics software that allows users to know about the whole experience of customers when they visited their website.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Custellence - Custellence is the most easy to use Customer Journey Mapping Tool built for customer journey managers and CX workers. The tool saves time and gives you confidence by having an intuitive interface and the right amount of journey mapping smartness
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.