add link to "links" section on main page for more software

doc/html/download.html

@@ -149,6 +149,9 @@
 	<P>
 		<B>NOTE: </B> these extras are not part of the FLAC project.  They are all freely available but distributed under their authors' own terms.
 	</P>
+	<P>
+		<B>NOTE: </B> don't forget to check out the '<A HREF="index.html">links</A>' section on the main page for a list of other useful open-source software supporting FLAC.
+	</P>
 	<P>
 		<B>GUI encoding/decoding front-ends:</B>
 	</P>