7-Zip, Bandizip and Winrar are tightly packed around very similar performances of 17 seconds, while PeaZip fast drag and drop implementation shows a clear performance advantage in this scenario completing the extraction in 13,6 seconds. WinZip provides an intermediate performance at 15,5 seconds.
FreeArc is an amazing open source compressor. Fast and fantastic compression ratios. Google's excellent diff/match/patch tools; Visual hashing explained, how to detect similar images. Ocropus is a open source library for Optical Character Recognition (OCR).