Adobe Campaign - Adobe Campaign provides campaign, offer, and personalization management capabilities.
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
Salesforce Journey Builder - Journey Builder empowers you to guide customers on 1:1 journeys across channels and devices to deliver the right digital marketing solution, via the right channel.
draw.io - Online diagramming application
Acquia Journey - Acquia Journey is an omnichannel tool that allows marketers to listen and learn from customers so they can craft a sequence of personalized touchpoints and trigger what they will see next.
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.