WBS Diagram - Lots of WBS diagram Templates and Examples
Here is one more work breakdown structure. It divides the software development and implementation into 5 smaller tasks. You can move and edit the shapes freely and the connector will stay connected to the shapes, unless you delete them.
It is easier to use Mind Map Shapes to create WBS diagram automatically with numbering
Arrangement Direction = Bottom, Check Numbering option, you can even export the WBS into MS Word.