Top Alternatives to Kaleidoscope

WinMerge is an Open Source differencing and merging tool for Windows.

Meld is an opensource visual diff and merge tool for developers.

Beyond Compare is a handy comparison tool to compare files.

KDiff3 (64-Bit) is a graphical text difference analyzer for up to 3 input files, provides character-by-character analysis and a text merge tool with integrated editor.

Araxis Merge two and three-way file comparison (diff) and merging application.

Comparison plugin for Notepad++ editor.

Code Compare is a free tool designed to compare and merge differing files and folders.

WinMerge is a free software tool for data comparison and merging of text-like files. It is useful for determining what has changed between versions, and then merging changes between versions.

Diffuse is a small and simple text merge tool written in Python. With Diffuse, you can easily merge, edit, and review changes to your code.

SmartSynchronize is a multi-platform file and directory compare tool.