Sopan Technologies is actively involved in development of many free and open source Joomla extensions like JConverter, Ajax Slideshow module, Google Ajax RSS module, YouTube list module and many others.
Demo of Extensions - Joomla Extensions Demo Site
You can download the extensions below. All extensions are licensed under GPLv2.
JConverter allows you to convert a WordPress site into Joomla by importing WordPress posts, categories, comments, users and links into Joomla.
Using Google Ajax RSS module, you can show multiple RSS feeds in a beautiful slider format.
Ajax Slideshow allows you to import and show any media RSS feed (Picasa, Flickr, PhotoBucket) in a slideshow format.
Frontpage Carousel shows your articles in a nice carousel view. It's perfect to showcase or highlight important articles on your site.
YouTube list module allows you to show multiple YouTube video in a drop down format and the selected video is played automatically.
With JQuery based Tweet It! module, visitors can tweet directly from your Joomla site without having to visit Twitter website.
YaBuzz is a Joomla content plugin which shows Google Buzz button with buzz count in different styles in Joomla articles.
CB My Diggs is a Community Builder plugin for Joomla which shows Digg.com stories dugg by user in a profile tab.
Virtuemart Shopping Cart Reminder is a plugin (manual installation and configuration) to send reminders to users having unapid orders in their cart.
Our public extensions are listed in Joomla extension directory (JED) as well - http://extensions.joomla.org/extensions/owner/sopantech
Sopan Technologies is also listed as Joomla consultant in official Joomla resource directory - http://resources.joomla.org/directory/other-services/consulting/sopantech.html