The Modifiers menu provides a way to apply frequently used modifiers quickly. It is organized into submenus. The availability of items on this menu depends on the current selection. If a modifier doesn't apply to currently selected objects, it is unavailable in the menu.
Interface
Selection Modifiers 
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Patch/Spline Editing
- Cross Section
- Delete Patch
- Delete Spline
- Edit Patch
- Edit Spline
- Fillet/Chamfer
- Lathe
- Normalize Spline
- Renderable Spline Modifier
- Surface
- Sweep
- Trim/Extend
Mesh Editing
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Animation
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UV Coordinates
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Parametric Deformers