Letterman is a simple Newsletter Component with Subscriber Management and HTML/ Image Embedding capabilities. Good for providing a simple Newsletter Feature on your site, without multiple Lists. YaNC Subscribers can be imported (XML/CSV). 

FadeImages is a simple plugin that allows you to display several images in the same location and fade between them.

SMO ShoutBox is based on Shout it! ( http://mamboforge.net/projects/shoutit/ ) 1.3 with many improvement (smilies management, archive pop-up, etc...) http://mamboforge.net/projects/smo-shoutbox/

DHTML menu module with infinite nesting. Supports multiple menus on one mambo site. Provides drop down menu & tree menu display types. Tested successfully on Firefox, Netscape, Opera, IE5/6. Each menu can use its own seperate css file. http://mamboforge.net/projects/infinity-menus/

This component is made from joomla core technology mean you do blog in Joomla way, so your user need no learn again how to send a blog , just use Joomla SUBMIT ARTICLE menu to do it! You need to install joomblog module such as: list of blog user, top n blog user. If you need to add comment to article i suggest to use Joomlaboard Discussbot to avoid spammer.

A component to manage a people directory with contact informations, search and edit forms, image upload, language files. 

Allows you to put one or many banners in every Content Item on your website, without the hassle it usually takes to put up an image, make a link of it and put it up your pages. - From the developer's site Developer site 

The Glossary component is a useful addition for many sites that use terms that sometimes need explanation.  It is running on the Remository site now.  There is scope for further development, especially of the innovative glossarbot that automates the links between content and the Glossary.  Glossarbot is also live here, and the new faster version 1.7 is available for download.  An experimental link (not in the download) is running here to apply the Glossarbot processing to file detailed descriptions in the Remository repository. The glossary mambot also needs to be installed in order to automatically find and highlight words in content.

Yet another Newsletter Component. Newsletter manager for mambo open source, this place will only be used for bugtracking. Official support forum can be found here: http://www.tim-online.nl/index.php/component/option,com_forum/Itemid,93/ http://mamboforge.net/projects/yanc/

AlphaContent (2.0) makes now makes it possible to display a Yahoo style directory of Joomla content in addition to alphabetical search. This directory is built with a tree structure similar to yahoo and the other major directories starting from the sections and categories of Mambo/Joomla. Many parameters for the presentation and selection possible of the sections/catégories to be or not posted. This component will be appropriate more particularly for all those which use the articles like system of cards, or those which need a classification of their items alphabetically or in the form of directory. Feature Highlights : - Show sections/catégories in the form of directory - Parameter setting of the number of categories to post - Parameter setting of the number of columns from 2 to 6 - Research on first character of the title or the intro - Sorting on items of contents - Sorting on items static - Sorting on the two types of contents - Taking into account of the files or not - Select on some sections and/or categories - Several views of the alphabetical selector - Posting or not ...