CMS, online store and help desk

[keymaster]

Hi,

I am looking to build a site which has three components integrated: a CMS, an online store and a help desk which supports attachments.

Does anyone have any idea of three products which will work together in this way (single login, single session, at the very least)?

Ideally, they would be opensource, but I am open to anything.

Thanks.

[craigpet]

Try Drupal.

[shri]

I'd go with the most critical function that you need (shopping cart or CMS or help desk) and then look at integrating other components with it.

I tend to like OSCommerce for startup sites and have generally been able to find coders to help integrate other components.