CTAN has a new package: chklref

[CTAN Announcements]

This package should be at your local mirror within a day.

Thanks again,
Jim Hefferon
Saint Michael's College

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The following information was provided by our fellow contributor:

Name of contribution: chklref
Version number: 2.4
Author's name: Jérôme Lelong
Location on CTAN: /support/chklref
Summary description: check for useless labels in LaTeX
License type: gpl

Announcement text: 
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It is quite common that after modifying a tex file, many
unused labels remain in it. The purpose of chklref is to
automatically find these useless labels. It also looks for
"non starred" mathematical environments with no labels and
advises to use a starred version instead.
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This package is located at 
   http://tug.ctan.org/tex-archive/support/chklref
.  More information is at
   http://tug.ctan.org/pkg/chklref
(if the package is new it may take a day for that information to 
appear).  We are supported by the TeX Users Group http://www.tug.org .  
Please join a users group; see http://www.tug.org/usergroups.html .