Guiffy Diff Merge tool & Folder Compare application and API Library Guiffy is a diff merge tool and folder compare application and API. SureMerge is the most trustworthy source code 3-way merge tool available. Advanced features include tuneable inline diff highlighting, syntax highlighting and a blend of 3 diff algorithms. 3-waycomparediffdirectoryfilefolderjavamergetool in Public bookmarkswith 3waydevelopmenteditormergetoolby 2 users