Simon Blackbourn

This plugin redirects newly-registered users to the Admin -> Edit Profile page when they first log in. Until they have changed their password, they will not be able to access either the front-end or other admin pages. An admin notice is also displayed informing them that they must change their password.
New administrators must also change their password, but as a safety measure they can also access the Admin -> Plugins page.
<h4>Translations included</h4>
<ul>
<li>Català (Catalan)</li>
<li>中文 (Chinese)</li>
<li>Nederlands (Dutch)</li>
<li>Français (French)</li>
<li>Deutsch (German)</li>
<li>Ελληνικά (Greek)</li>
<li>Hebrew</li>
<li>Hindi</li>
<li>Magyar (Hungarian)</li>
<li>Italiano (Italian)</li>
<li>日本語 (Japanese)</li>
<li>Khmer</li>
<li>한국어 (Korean)</li>
<li>Lietuvių kalba (Lithuanian)</li>
<li>македонски јазик (Macedonian)</li>
<li>Polski (Polish)</li>
<li>Português do Brasil (Brazilian Portuguese)</li>
<li>Português (Portuguese)</li>
<li>Română (Romanian)</li>
<li>Русский (Russian)</li>
<li>Español (Spanish)</li>
<li>Türkçe (Turkish)</li>
</ul>
New translations are very welcome – please submit them via <a href="http://wp-translations.org/" rel="nofollow ugc">WP-Translations</a>. This plugin’s WP-Translations page is <a href="https://www.transifex.com/projects/p/force-password-change/" rel="nofollow ugc">transifex.com/projects/p/force-password-change</a>

Force Password Change

Require users to change their password on first login.

David Anderson / Team Updraft

This plugin forbids any user to choose any password from the “common passwords list” obtained from http://www.openwall.com/passwords/wordlists/, and requires any who are already doing so to reset their passwords.
<h3>License</h3>
Copyright 2012- David Anderson
MIT License:
Permission is hereby granted, free of charge, to any person obtaining 
a copy of this software and associated documentation files (the 
“Software”), to deal in the Software without restriction, including 
without limitation the rights to use, copy, modify, merge, publish, 
distribute, sublicense, and/or sell copies of the Software, and to 
permit persons to whom the Software is furnished to do so, subject to 
the following conditions:
The above copyright notice and this permission notice shall be 
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, 
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

No Weak Passwords

This plugin forbids any user to choose any password from the "common passwords list" obtained from http://www.openwall.

Force Password Change vs No Weak Passwords