Simple Intranet Software Any Software To Create A Quick And Simple Intranet?

Any software to create a quick and simple intranet? - simple intranet software

We are a small boutique Microsoft 20-30 employees. Mainly engaged in developing our own software. No time for developers who work on our own company intranet. I wonder whether we can buy commercial software to quickly build our own intranet, easy, easy? All ideas, suggestions, recommendations?
Thank you in advance.