Ben Doherty (Oomph, Inc)

Specify a list of tags to keep hidden: These tags will be invisible to users, 
such as in tag clouds or in post tags lists. This is useful when using tags to 
control behavior of your blog, or when you wish to maintain groupings of posts 
out of the public eye.
This does not prevent tag archives for hidden tags from being accessible, only 
hides tag links from tag lists and tag clouds.
Capable users (with the see_hidden_tags capability,) can see hidden tags in 
tag lists (but NOT tag clouds.) Hidden tags will receive the .hidden-tag class 
and are grayed out by default.

Oomph Hidden Tags

Hide certain tags from tag lists and tag clouds. Allow capable users to see hidden tags with the see_hidden_tags capability.

Daniele Alessandra

HideMeIn is a WordPress Plugin that hides you from other users’ eyes. 
Once installed and activated no one will see you in administrators’ dashboard, neither in users administration page.
What it does
<ul>
<li>It hides you! Only you will see your name in administrator’s pages.</li>
<li>It hides itself, only you will see that this plugin is running.</li>
</ul>
What it does not
<ul>
<li>It does not grant access to a WordPress installation if you are not authorized.</li>
</ul>
Compatibility
This plugins is written using only no particular hacks, so it is virtually compatible with any other existing plugin. If you are experiencing problems with this plugin please tell me your theme name and list all plugins you are using, I’ll do my best to fix any incompatibility issues.
Demo
This plugins needs Administrator capabilities to work, because of this I’m not able to set up a demo for you at the moment.
<blockquote>
THIS SOFTWARE IS PROVIDED BY THE AUTHOR “AS IS’’ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</blockquote>

HideMeIn

HideMeIn is a WordPress Plugin that hides you from other users’ eyes. Once installed and activated no one will see you in administrators’ dashboard, n …

Oomph Hidden Tags vs HideMeIn