Examples of popular commercial applications written in PHP?

Question

I was just curious to find out if I can put together a list of popular, commercial applications written in PHP. I'm just wondering what people built using PHP and how well it looks like the application they developed.

Some of them I know:

• Modernbill
• WHMCS
• forum

What else is there?

EDIT: To clarify, I am looking for commercially available commercial applications that you can purchase. I think "I bought a copy of Microsoft Windows," not "I used the Google search engine."

Answer 1

What about facebook? I heard that it is popular these days.

Answer 2

Digg.com and Wordpress will both be pretty big players.

Answer 3

Magento - E-Commerce Package

Answer 4

ExpressionEngine is written in PHP, a fairly popular blogging engine.

Edit: Oh, and don't forget that the Mint website tracker and RSS reader are Fever .

Answer 5

Quote from Wikipedia :

As of April 2007, more than 20 million Internet domains had web services hosted on servers with PHP installed and mod_php was recorded as the most popular Apache HTTP Server module. Significant PHP-written websites, including Facebook, Wikipedia (MediaWiki), Yahoo !, MyYearbook, Digg, Joomla, WordPress, YouTube in the early stages, Drupal, Tagged, and Moodle.

Answer 6

Timely discovery I made here:

10 years of PHP applications that changed the world

http://blog.fedecarg.com/2008/05/22/open-source-php-applications-that-changed-the-world/

Did you mean non-open-source or did you mean companies making money?

Answer 7

I really like activeCollab . It is a project management and collaboration tool.

Answer 8

Good examples of commercial php software that I know about (out of order): activecollab, vivvo cms, predator cms, interpire email marketer ... but there are also many small scripts that sell well on codec as long as I I see sales statistics

Answer 9

Well, this is not quite the answer, but the answer to Salgar's comment (since I joined quite recently and have not yet received enough reputation to comment - and it may even cost a few downvotes), but I couldn’t let it go, and I hope that he is sarcastic):

Yes, I heard that everyone on facebook works for free, it's more a movement than a company.

I can argue for three thousand hours about this statement, but there is one simple link here to prove that this is garbage: http://www.facebook.com/#/careers/?ref=pf . If you want to find this link, you can go to the main Facebook page and scroll down the page, where you will see the Career link on the right.

In fact, I don’t think that anyone at all works on Facebook for free, perhaps Mark Zuckerberg does.

Answer 10

A cubic trolley is another one.

Answer 11

This is actually not a commercial application, and Facebook is PHP. If you are concerned about the workload and ability to support many users, I think this is a good example.