kdiff3 is queued for analysis. Crawling candidates and ranking them takes a few minutes. This page updates itself when the list exists — you can also come back later.
What is known so far comes from the other direction:
These projects were analysed and named kdiff3 among their alternatives. The relationship is not symmetric — how kdiff3 rates them is a separate judgement, made when kdiff3 is analysed in its own right.
calls kdiff3 “Choose it as a drop-in replacement when you need a cross-platform GUI diff/merge tool with strong three-way merging.”
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.