I am assessing some of the open source CMS softwares, and I have been looking at pligg and drupal. I looked at pligg first, and i am looking into drupal now. When I went to their demo, i noticed that they had a number other open sources inside the demo. My question is, can I use they open source software with drupal without having to re-install them or at least if i have to, is it really easy to merge the db of those softwares with drupal db that way the users will have a single log in? --> some of those open source cms listed are wordpress, wikimedia, b2b evolution, etc.
The Drupal demo that is linked from their website is not hosted on the Drupal website itself. The link points to opensourcecms.com that is a platform for testing various CMSs. And that's why you see different CMS and blog systems linked to the navigation at opensourcecms.com. This only means that you can test many open source applications on this website - not that they are all integrated into Drupal itself. However it is possible to integrate the user databases of different applications into Drupal - for example forums. To achieve this there must be a Drupal module that acts as a bridge between Drupal and the other software. You can find modules at http://drupal.org/project/Modules.
Thanks a lot for the explanation. I pretty much had the wrong idea about drupal. when i saw that site (open source cms.com) without realizing that it was a demo site, i thought to myself first that it was a demo for drupal and all the other softwares that can be integrated in it. but now i know better. thanks again.