DiffEditor is a text editor that visually displays the contents difference like
Displays the diff strings in outstanding color
Provides the enhanced search including regular expression, incremental
search, matching bracket, and the matching HTML/XML tags.
Displays highlighted syntax for the well-known text
Allows Diff-Block copy.
Provides Undo & Redo.
Opens a file in single-edit mode which means DiffEditor can be used as a normal text editor.