First note: Icons for none, Fem, Inspection, Points, Reverse Engineering and Test framework workbenches are missing.
Second note: I made macros for all workbenches that have icons on the wiki page with text editor and copied them to macros folder. Inside FreeCAD only 10 of them showed up in the list. First i thought 10 was "hard limit" for number of macros supported but then i created missing ones from inside FreeCAD. Creating them from inside FreeCAD allowed me to have more then 10 macros!
Third note: I tried everything i can think off and could not upload image to the FreeCAD forum. I searched the forum and there are some images uploaded so i guess this is possible but it did not work for me.
Ok, now the image:
-First toolbar is standard toolbar with workbench switcher.
-Second toolbar is toolbar with all the workbenches icons available on the wiki page.
-Third toolbar is an example of custom toolbar with one set of workbenches.