You can find them here:

aLinks –
Edit 05-26-2009 – aLinks seems to be no longer supported by its developer, however you can get an updated (modified) version of aLinks here:
http://bugfox.net/blog/2008/11/14/alinks-20-bug-fixes/
A WordPress plugin that automatically links keywords in your blog post. By Sean Hickey.

AWeber Plugin – http://wordpress.org/extend/plugins/aweber-wordpress-plugin
Aweber allows you to subscribe people to an aweber list when they register or post a comment to your blog. By Guru Consulting Services, Inc..

Google XML Sitemaps – http://www.arnebrachhold.de/redir/sitemap-home/
This plugin will generate a sitemaps.org compatible sitemap of your WordPress blog which is supported by Ask.com, Google, MSN Search and YAHOO. Configuration Page By Arne Brachhold.

InstantUpgrade – http://www.zirona.com/software/wordpress-instant-upgrade
Upgrade your WordPress installation with one simple click via the InstantUpgrade panel. Attention: This is a BETA release; if you don’t know what that means, you shouldn’t be using this software. By Alex Günsche.

Lucia’s LinkLove – http://money.bigbucksblogger.com/
Where a commenter has commented at least some number of timeslinks are made “dofollow”. User interface permits blogger to do follow author link or links inside comments. By Lucia Liljegren.

NextGEN Gallery Widget – http://alexrabe.boelinger.com/?page_id=80
Adds a sidebar widget support to your NextGEN Gallery By NextGEN DEV-Team.

Odiogo Listen Button – http://www.odiogo.com/download/wordpress/plugin/odiogo_listen_button_latest.php
Give your blog a voice! Add a “Listen Now” button to your blog so your readers can listen to your posts and download podcasts. Free Sign up. By Odiogo.

SimplePie Core – http://simplepie.org/wiki/plugins/wordpress/simplepie_core
Does little else but load the core SimplePie API library for any extension that wants to utilize it.  By Ryan Parman and Geoffrey Sneddon.

Sociable Zyblog Edition – http://www.zyblog.de/wordpress-plugins/sociable-zyblog-edition/
Automatically add links on your posts to popular social bookmarking sites. By Tim Zylinski.

TinyMCE Advanced – http://www.laptoptips.ca/projects/tinymce-advanced/
Enables advanced features and plugins in TinyMCE. By Andrew Ozz.

WordPress Database Backup – http://www.ilfilosofo.com/blog/wp-db-backup
On-demand backup of your WordPress database. By Austin Matzko.

WP-HopAd – http://hopadplugin.com/
Provides a simple way to sell clickbank products via customizable HopFeed ad blocks. By HopAd Plugin.

WP Ajax Edit Comments – http://ajaydsouza.com/wordpress/plugins/wp-ajax-edit-comments/
Allows users and admin to edit their comments inline. Admin and editors can edit all comments. By Ajay D’Souza.