stroy is a smart diff tool. It specializes on directories of files. Its differentiating feature is the ability to match files with different name, location and content. A useful tool for comparing differences between directories.

stroy is a graphical directory diff tool. Tools of this kind show a structural diff, i.e. show you what files changed were added or deleted. Stroy does this but additionaly it shows structural changes, i.e. moves and renames.
stroy is capable of matching files they were renamed and moved or their content has changed.

stroy Features:
1. Smart matching
stroy compares directories and matches files and subdirectories using several strategies e.g. name, parent, content checksum and finally content fuzzy hash comparisons.

2. Filtering
stroy has an extensible pattern matching logic to filter out irrelevant files. It can also remove files from an already performed diff.

3. Preferences
stroy allows to configure viewing programs, file diffing programs and diff strategies per file type.

4. synchronized scrolling
Sounds obvious but with matches of files with different parents this was not trivial (shoulder padding).

5. OSX look and feel
stroy is a Java program but it goes to some pains to look like a native OSX program.

6. Windows look and feel
Well there is an exe with the right icon of a windows programs.

7. Cross platform support
The cross platform package works on linux, osx and windows.

The license of this software is Freeware, you can free download and free use this file compare software.