Add link for Varyfan.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1998 7894878c-1315-0410-8ee3-d5d059ff63e0

doc/useful_addresses.html

@@ -184,6 +184,10 @@ implementations. Please report any other references you have found!</p>
 	<li><a href="http://www.linuxgod.net/~jd/">WMSens Dockapp</a>
 		<br />A Windowmaker dockapp that works only with the Winbond 83697HF chipset.
 		By Jonathan D. Meadows.</li>
+	<li><a href="http://member.melbpc.org.au/~iann/varyfan/">Varyfan</a>
+		<br />A C program to vary the fan speeds for the CPU and case fans according to
+		the temperature of the CPU and motherboard. By Ian Nicholls, more or less
+		abandoned.</li>
 	</ul>
 </li>
 <li><span class="toplvl"><a name="other">Other hardware monitoring implementations (not using LM Sensors)</a></span>