From owner-freebsd-doc@FreeBSD.ORG  Wed Jan 16 05:56:06 2013
Return-Path: <owner-freebsd-doc@FreeBSD.ORG>
Delivered-To: freebsd-doc@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id D5D53153
 for <freebsd-doc@freebsd.org>; Wed, 16 Jan 2013 05:56:06 +0000 (UTC)
 (envelope-from wblock@wonkity.com)
Received: from wonkity.com (wonkity.com [67.158.26.137])
 by mx1.freebsd.org (Postfix) with ESMTP id 394A4A17
 for <freebsd-doc@freebsd.org>; Wed, 16 Jan 2013 05:56:06 +0000 (UTC)
Received: from wonkity.com (localhost [127.0.0.1])
 by wonkity.com (8.14.6/8.14.6) with ESMTP id r0G5u5lg079116
 for <freebsd-doc@freebsd.org>; Tue, 15 Jan 2013 22:56:05 -0700 (MST)
 (envelope-from wblock@wonkity.com)
Received: from localhost (wblock@localhost)
 by wonkity.com (8.14.6/8.14.6/Submit) with ESMTP id r0G5u5Zj079113
 for <freebsd-doc@freebsd.org>; Tue, 15 Jan 2013 22:56:05 -0700 (MST)
 (envelope-from wblock@wonkity.com)
Date: Tue, 15 Jan 2013 22:56:05 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: freebsd-doc@freebsd.org
Subject: Web page diff
Message-ID: <alpine.BSF.2.00.1301152241100.79017@wonkity.com>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7
 (wonkity.com [127.0.0.1]); Tue, 15 Jan 2013 22:56:05 -0700 (MST)
X-BeenThere: freebsd-doc@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Documentation project <freebsd-doc.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-doc>,
 <mailto:freebsd-doc-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-doc>
List-Post: <mailto:freebsd-doc@freebsd.org>
List-Help: <mailto:freebsd-doc-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-doc>,
 <mailto:freebsd-doc-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Jan 2013 05:56:06 -0000

Does such a thing as a "web diff" exist?  A graphical diff, somehow 
showing two pages side-by-side and highlighting areas that have changed.  That would 
make checking content changes much easier, no diff(1) output or markup 
to distract from the content.

So far the only thing that I've found is a plugin for IE: 
http://www.ghacks.net/2010/12/12/diff-ie-highlight-webpage-changes-in-internet-explorer/

Untested because, well, it's for IE.