Advanced Zip Repairer(AZR) is a powerful tool to repair corrupted Zip files and Self Extracting files(SFX). It can recover your data in zip archives as much as possible, so to minimize the loss in file corruption. Currently AZR can fix all sub-types of zip files and all kinds of self-extracting files, also it will provide a tiny exe stub when repairing SFX files. Moreover, it has integrated with windows shell and supported drag & drop operations, which will make you repair files easily and quickly.

http://www.qwerks.com/product.asp?ProductID=3509