MediaWiki
From code/src wiki
Secure Login
mediawiki sends plain-text passwords over the network by default. Use the following extension to enable SSL for the login page.
Extract the SecureLoginPage.tar.gz file into the /var/lib/mediawiki/extensions directory, then insert the following into your /etc/mediawiki/LocalSettings.php file:
require_once("$IP/extensions/SecureLoginPage/SecureLoginPage.php");
_Note:_ An SSL-enabled VirtualHost is required in your Apache config.
Original code obtained from the code examples of the book MediaWiki by Daniel J. Barrett.