I just installed the productivity power tools from http://visualstudiogallery.msdn.microsoft.com/d0d33361-18e2-46c0-8ff2-4adea1e34fef.

Productivity power tools are set of extensions to improve the usability of visual studio designer. One of the major extension is the all new Add Reference with multi-targeting. Excellent way to add multiple references at once.

Another extension is the new Solution Navigator to search the files in Solution explorer. This will search the files in solution.

Solution Navigator