Hyperlinks from ]]> tags in the XML comments.
The ability to select a number of classes as top level code (i.e. callable from outside of your solution) and have Resharper report on all unused code elements, even if those code elements are marked as public.
Similar to the above, but with the ability to "lock down" the code by analysing and giving every class, method, property and event the least privileged access (i.e. public, protected+internal, protected, internal, private.
Auto-complete for classes that are not in the currently scoped namespaces. (Currently I have to type the entire class name and then Resharper prompts to add the using directive - sigh).
Promote local to field.
Alt+Enter light-bulb to "Create overload".
Move method/property to another class (leaving delegating stub)