There are a lot of these floating around and I'm even getting updates as people post more suggestions and comments or whinge about various aspects of what other people have written or suggested ... There is also a new site http://www.thebestopensource.com/ which looks promising.

So now I'm keeping my own list. I'm an Ubuntu user so the article is biased towards what is easy to set up on Ubuntu. Ideally, being lazy, I prefer there to be a debian/Ubuntu package available via a respectable repository.

The thing that made me kick of this list was a post I saw recently titled "The 25 Best Alternatives To Your Enterprise Applic..." - only a few of the applications where actually Open Source and some of them still had license fees.

The List

content Management Systems
Alfresco Open Source Content Management
Drupal
Joomla

Office Applications
OpenOffice

Customer Relationship Management
SugarCRM
CiviCRM

IT Service Management/ITIL
OTRS
GLPi

Project Management
dotProject
openProject