I have been asked to create an Internal Knowledge Sharing web site. Something everyone can contribute to and search for answers on. So I need to find a bit of software to start this on. I am looking for something very similar to what this site uses. Our requirements:
1. Open Source.
2. Simple to setup and use.
3. RSS Feeds or some subcription option.
4. Not a lot of customization required.
5. Integrate with our LDAP directory.
Of course we have no budget.
So I am looking for suggestions.