There has been hype building around Composer and I am hyped about it. It’s main user base is coming from within the Symfony community and looking at it’s code, you can see the Symfony influence in it. And I tell y’all, this tool is pretty cool.
Composer is really more of a dependency manager and can be (usually is) used withing a project to define it’s dependencies, and makes it easier for other developers to get those dependencies easily with a single command. It is not so mature yet but the development is rapid.
I also mention an idea I have about using composer for installing PHP toolsets. Read on.