Beyond Compare - Beyond Compare allows you to compare files and folders.
Solid Explorer - Solid Explorer is a powerful Android file manager featuring access to most popular cloud storages, root access and easy extensibility.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
MiXplorer - MiXplorer is a mobile app that was designed to make it easy to organize and manage the files on your Android device.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.