Extensions and Templates

AchTube
Video sharing and broadcasting component for Joomla!.
http://www.achtube.com

Ajax Whois
Ajax based domain search component.
http://www.softuff.org/

Best of Joomla!
Provides news, templates, tutorials and links. Official home of Fireboard forum.
http://www.bestofjoomla.com

Compass Design
Professional web design company specializing in Joomla! websites, templates and tutorials.
http://www.compassdesigns.net

Dart Creations
Provides freelance web development. Also contains Joomla! tips, tutorials, and free modules.
http://www.dart-creations.com

Desig-Joomla
Customised templates for Joomla! CMS. Components and module coding.
http://design-joomla.eu

DesignForJoomla.com
Free and commercial Joomla templates, components, modules, plugin and tutorials. Home of eZine and User Sync component, Instant Search and Content Listing module, Image Extended plugin and other freebies.
http://designforjoomla.com

Elearningforce
Custom Joomla! components, modules and add-ons.
http://www.elearningforce.biz/

Estime Templates
Provides free Joomla! templates and modules.
http://www.estimetemplates.com

Fastball Productions
Joomla! extensions for baseball team management.
http://www.fastballproductions.com

Free Joomla Templates
Offers free templates for the Joomla open source content management system.
http://www.ty2u.com

GavickPro
Joomla templates club. Offers a resource of free and professional Joomla templates, menusand modules.
http://www.gavick.com

Groupjive
A component that provides all registered Joomla! users the ability to create groups, join together with other users and generate content that is unique to their group(s).
http://www.groupjive.org

The J! Factory
Develops a number of open source and commercial extensions for Joomla!.
http://www.thejfactory.com/

JCE
A WYSIWYG content editor for Joomla!.
http://www.cellardoor.za.net/

JforJoomla
Provides templates, components and extensions.
http://www.jforjoomla.com

Joomla Elements
Commercial Joomla! components and plugins. Especially provides marketing-related solutions.
http://www.joomlaelements.com

Joomla Equipment
Develops professional components for websites powered by Joomla! CMS.
http://joomlaequipment.com/

Joomla Junkie
Template provider aimed at offering free and commercial templates for Joomla!.
http://www.joomlajunkie.com

Joomla Themes
Latest theme news, reviews and opinion on Joomla! themes.
http://www.joomla-themes.co.uk

Joomla Xtreme
Offers free templates and extensions.
http://www.joomlaxtreme.com/

Joomla-addons
Open source and commercial components for Joomla!. Home of EasyFAQ, Easy Guestbook, YaNC, ODT Indexer, and Blocklist.
http://www.joomla-addons.org

JoomlaAtWork
Provides commercial components for Joomla! and free downloads to improve Joomla for SEO.
http://www.joomlatwork.com

Joomlaco
Providing helpful articles to get you started with Joomla! and Mambo. Free templates, components and modules in download section.
http://www.joomlaco.com

JoomlaDesigns
Offers free and commercial templates. Commercial templates also include the original Photoshop files used in the design.
http://www.joomladesigns.co.uk

JoomlaFCK Editor
Fast and lightweight WYSIWYG editor for Joomla!.
http://www.joomlafckeditor.com/

JoomlaJet
Joomla! and Mambo templates for businesses and individuals who want to focus on clean designs and professionalism.
http://www.joomlajet.com/

JoomlaLMS
eLearning software for distance learning and online corporate training.
http://www.joomlalms.com/

JoomlaPlug
Home of Joomla Cloner backup and restore component and a few other Joomla! tools.
http://www.joomlaplug.com

JoomlArt
Commercial templates club for Joomla! CMS. Live template demos and free templates available.
http://www.joomlart.com

JoomlaShack
Provides templates and downloads, tutorials and customization services for Joomla!.
http://www.joomlashack.com

Joomlasolutions Template Club
Joomla Template Club. Professional templates including source files like Photoshop PSD and Flash FLA. [Commercial and GPL Products]
http://www.joomlasolutions.com

Joomlaspan
Home of the AdSense, Chitika, AdBrite modules, GSearch Pro and JTrans Pro components. Free templates are also available.
http://www.joomlaspan.com

JoomlaTemplateStyle
Offers free Joomla! templates.
http://www.joomlatemplatestyle.com

JoomlaWeb
Provides free Joomla! 1.5 templates and resources.
http://www.joomlaweb.com

JosXP.com
Provides components, modules and XP/Vista style Joomla! templates.
http://www.josxp.com

MisterEstate
Free real estate component for Joomla!.
http://www.misterestate.com

MyJoomlaSkins
Provides both free and paid templates for Joomla!.
http://www.myjoomlaskins.com/

Open4G
Ajax components and modules for Joomla!, and Template Builder extension for NVU.
http://www.open4g.com

ProjectFork
A project management extension for Joomla!.
http://www.projectfork.net

RocketTheme
Joomla! templates club that offers professional quality designs for its members. New Joomla! templates released every month.
http://www.rockettheme.com

Sakic.Net
Joomla! components and professional services Emir Sakic. Home of the SEF Advance component.
http://www.sakic.net

SAM Code Team
Repository of the team's open source projects for Joomla! and Mambo. Home of samSiteMap and Josaddphp Bothot.
http://coders.mlshomequest.com

Shape 5
Provides templates focused on aesthetics, functionality and accessibility.
http://www.shape5.com

SmoothGallery + Lightbox Joomla Mambot
A combination of SmoothGallery and Slimbox scripts packaged together for an easier use.
http://www.oscandy.com/joomla/22-smoothgallery-lightbox-joomla-mambot/

Socioclick
Provides social media components, modules and mambots for Joomla! CMS.
http://www.socioclick.com

TemplatePlazza
Joomla! template club. New templates released every month.
http://www.templateplazza.com

toJoomla
Provides template conversion service for Joomla!. Converts any website into a Joomla! site.
http://tojoomla.com/

Ulti Joomla
Provides templates and extensions for Joomla! 1.5.
http://www.ultijoomla.com/

Vivid Tools
Provides services and develops components for websites powered by Joomla! CMS.
http://www.vividtools.com

Voodootools
Offers several Joomla! addons and Community Builder plugins.
http://www.voodootools.de

WebAmoeba
Supplies open source solutions for Joomla! systems. Namely the WebAmoeba Ticket System, the support component for Joomla! and Mambo.
http://www.webamoeba.co.uk

You Joomla
Joomla! templates club that provides templates to Joomla! Community.
http://www.youjoomla.com

Joomla! Extensions Directory - Latest Extensions
RSS feed of the latest extensions available for Joomla!. [RSS]
http://feeds.joomla.org/JoomlaExtensions