I finally got the time to include of the last layout of Mathieu that was not included: the reverse radial tree layout.

Here what it looks like (the edges are just for aesthetic purpose).

The script was made in Moose, using the following:

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view shape ellipse size: [ :cls | cls numberOfMethods log * 7 ].
view nodes: classGroup.
edges := view edgesFrom: #superclass. 
view layout: (ROReversedRadialTreeLayout new userDefinedEdges: edges).

bs := (ROBSplineLine  new).  
bs alpha: 0.85.
bs setDiscovery: [ :cls | cls superclass ].
bs color: (Color red alpha: 0.5).

view shape: bs.

lastlevel := classGroup select:[ :cls | (cls subclassHierarchy size) == 0 ].
view edges: lastlevel from: #yourself toAll: [ :cls | (cls queryAllOutgoingInvocations atTypeScope) select: [:clsa | (clsa subclassHierarchy size) == 0 ]].

view raw bitmap.

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Cheers,

Alexandre