WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.

Replication of Zheng Song, Kjetil Storesletten & Fabrizio Zilibotti (2011), "Growing Like China," American Economic Review, vol. 101(1), pages 196-233 in Python.