Kdiff3 by joachim eibl social advice

KDiff3 is a program that compares or merges two or three text input files or directories, shows the differences line by line and character by character (!), provides an automatic merge-facility and an integrated editor for comfortable solving of merge-conflicts, supports Unicode, UTF-8 and other codecs, autodetection via byte-order-mark "BOM" supports KIO on KDE.