WOW64Ext is a helper library for x86 programs that runs under WOW64 layer on x64 versions of Microsoft Windows operating systems. It enables x86 applications to read, write and enumerate memory of a native x64 applications. There is also possibility to call any x64 function from 64-bits version of NTDLL through a special function called X64Call(). As a bonus, wow64ext.h contains definitions of some structures that might be useful for programs that want to access PEB, TEB, TIB etc. The project is written primarily in C++, first published in 2015. It has gained significant community traction with 1,006 stars and 316 forks on GitHub. Key topics include: assembly, wow64, wow64-heaven-s-gate, wow64-load-win64dll, wow64ext.