Similar to Diff

Eval

Exit (command)

File (command)

Find (Unix)

Grep

Kill (command)

Ln (Unix)

Ls

Mesg

Mkdir

More (command)

Nl (Unix)

Pax (command)

Rm (Unix)

Rmdir

Split (Unix)

Tee (command)

Touch (command)

true and false (commands)

Compress (software)

Wall (Unix)

Who (Unix)

Write (Unix)

Beyond Compare

File Compare

Meld (software)