Available in Plugin Manager:
Compare contents of 2 tabs or panes (including ones not visible at the same time) from caret or selection start to end of file. Compares the last 2 panes that had focus, within a project.
Works in split panes or separate tabs. Source is embedded in the jar file.
"Most of you are familiar with the virtues of a programmer.
There are three, of course: laziness, impatience, and hubris."
- Larry Wall