Since the development of this great v6 add-on stalled, I took the opportuni

Directory Graph Explorer
1

Since the development of this great v6 add-on stalled, I took the opportunity and made the Vaddin 7 port and several enhancements. See https://vaadin.com/directory#!addon/graph-explorer-vaadin-7

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Awesome! I updated the description of this add-on to point to yours. :)