Degate is a graphical reverse engineering tool for Ubuntu and OS X.
Degates’ purpose is to aid reverse engineering of digital electronics in integrated circuits (ICs). Degate helps you to explore images from ICs. It matches logic gates on the imagery given by graphical templates and it assists you in tracing circuit paths. Degate is not a completely automatic analyzing tool. Degate helps you with some automation in your manual reverse engineering process.
According to the Degate project, the software was already used to extract the DECT Standard Cipher and the encryption algorithm of Legic prime. It was also used to extract the memory encryption scheme of a common smartcard processor family.