Try Visual Paradigm Online (VP Online) Free Edition. It is a FREE online drawing software with support to UML Activity Diagram and other UML diagrams, ERD and organization chart. You can easily draw Activity Diagram through the simple, intuitive UML editor. As a real free drawing tool, there is no ad, no limited period of access and no limitations such as, number of diagrams, number of shapes, etc. You own the diagrams you created for personal and non-commercial purposes.
Create as many UML drawing as you need and output them into images. No ad.
Create UML can be simple and fun. Listed below are some of the editing features of our intuitive Activity Diagram editor:
Position shapes precisely with alignment guide. Format your Activity Diagram with the array of formatting options we provide: shape and line format, font style, RTF shape caption, rotatable shapes, shape alignment and distribution, embed image and URL, etc
Essayez vous-même. Il suffit de parcourir et de modifier les exemples de diagramme d'activité ci-dessous. Vous verrez par vous-même que c'est tout ce que nous disons, ou peut-être plus.