The not so clever article title aside SE-Explorer is a relatively new entry into the file manager/Windows Explorer alternative space. As of this date it is at version 0.0.30.600 and is not without its performance issues. The portable version tested on a XP computer is slow to start and the ever illusive zip or archive [...]

FreeFileSync is described by its author as
…is an Open-Source folder comparison and synchronization tool. It is optimized for highest performance and usability without restricted or overloaded UI interfaces

FreeFileSync has a simple yet attractive, with well made icons, interface that synchronizes folders and compares files and folders. The options to compare are based on file [...]