Is there any open source framework that encapsulates: a Wiki, Forum and a ticket system. Something like a software configuration Manager (SCM).
Looking for something very similar to sourceforge offers to project owners.
I’m looking to give support to a small private web software project. I keep finding separate implementations of these features.
If there are commercial products it would be nice to hear from them too.
WordPress might be an option.

You could use Redmine. It offers a Wiki, Boards (=Forum), Issue tracking.
Another popular alternative would be Trac which offers Wiki and Issue tracking. For forums there exists a plugin (The plugin is not actively developed anymore?).