This is a list of developers who can help you  or give support  or  write customizations  for VirtueMart, Joomla or PHP apps in general.

Konstant Infosolutions Pvt. Ltd.
Konstant Infosolutions Pvt. Ltd expertise in providing variety of services and solutions in PHP, ASP.NET, HTML 5, Mobile Applications (iPhone/iPad, Android, Windows etc.), Open Source CMS (Magento, Drupal, Joomla, Wordpress, etc.), Flash/Flex, SEO and IT Consulting Services.
Loja Weber TI - Luiz Weber
Loja Weber TI - Pioneira em pagamentos para VirtueMart 2.0 no Brasil. - Desenvolvimento de Plugins de pagamento ( boleto bancário - J!Boleto, Cielo, Redecard, Itaú Shopline, Banco do Brasil, etc ). - Plugins de frete ( Correios, transportadoras ) - Plugins extras ( simulador de frete, compre junto, gift wrap ). - Consultoria especializada Responsável: Luiz Felipe Weber @luizwbr
Web link: Loja Weber TI
MGS Creativa - Web Development - Joomla/VirtueMart Development
We offer all our web development experience to serve your business since 1999. We develop all kinds of websites using free software and open standars. We use Joomla! to simplify website maintenance and scalability. Joomla! is the most popular content management system (CMS) that's completely free software. With Joomla! you will be able to self administer your site without the need to know any HTML programming, and the best of all, there are no royalties or software licences fees related to Joomla! CMS. With us you will get faithful advice for the development of your website.

We have plenty of experience in Joomla! powered websites, which we install, adapt and tweak according to you very specific needs.We provide first class website templates to speed up your web release time, and to adapt the look and feel of your new website. In addition we provide advise about Joomla! extensions that increase the Joomla! functions and posibilities, like VirtueMart, that is a professional e-Commerce Joomla! addon that turns your Joomla! site into a complete online store.

Mindinventory
Mindinventory provides variety of web and mobile app development services and solutions in PHP, HTML 5, Mobile Applications (iPhone/iPad, Android) and Open Source CMS development and customization services.
Web link: Mindinventory
MobAppTemplate
Get best quality native mobile application templates for iOS and Android from MobAppTemplate.com. Premium custom designed app templates, starting at $99.

Experience the most successful mobile app template services offered by MobAppTemplate.com Our well-designed and interactive mobile app templates facilitates our clients to deliever better user experience. We also provide customize mobile app template service in which we allow our clients to choose any template and we will transform it into an exclusive piece that can furnish to the requirements of your business.

Web link: MobAppTemplate
Nethues Technologies
In order to make sure that you get exactly what you are looking for, Nethues Technologies team has the expertise in the following: PHP, Microsoft Technologies (ASP and ASP.Net), Open Source CMS (Virtuemart, WordPress, Joomla, Drupal, Magento, CS-Cart, Expression Engine etc) Apple iOS (iPhone, iPad) Android, Blackberry, Flash, Ajax and Facebook Apps developments – and that is to name but a few!
Nodes
We develop awesome web and mobile apps!

Nodes have been developing applications for apps since 2009, working with a wide array of programming languages, including but not limited to PHP, CSS, HTML, JS, Java, XCode, C# and many others.  Our skilled team of in-house developers are ready to help make projects even more awesome!

Open Source Technologies
We are a team of 40+ PHP/MySQL Developers. We have done a lot of work in Joomla + VirtueMart. Some of our recent work - http://greetntreat.com/ http://dietpancakes.com.au/ http://smartmow.com http://www.natoumx.fr