FileOptimizer 15.40.2677
Lossless file size optimizer supporting CHM, PUB, DIB, EXE.....etc. It keeps the behavior of the file untouched, but with its size reduced thanks to several re-compression and optimization techniques.
Guetzli Alexey Pavlov Jean Marc Dupuis Windows Phone Alexey Pavlov Open Source Portable Fileoptimizer
Source: neowin.net