By using Object generator you can create a custom rig. Create hierarchical controllers by using controllers. Spline in conjunction with skin helps you to rig objects like tail, rope, feather etc.
Load PSL: Lets you load a PSL file from disk.
Load Bitmap: Lets you load a PSL file from disk.
Link: Activates link tool.
Unlink: Unlinks selected objects.
Align: Opens align dialog option.
Pivot: Activates Pivot mode.
Spline: Lets you create spline by clicking on viewport.
Controller: Lets you create simple shape controller by clicking on viewport.
Skin: select a part of spline and object(s) that you want be skinned and hit this button.
Delete Skin: Deletes skin from selected object(s)
For creating an object, do following steps: