Apple decoupled the compiler/command line tools from Xcode specifically so that projects like MacPorts and HomeBrew can continue to exist on the Apple platform. There was a post on this a while back on HN!
I absolutely love HomeBrew, it is modeled a lot after MacPorts/FreeBSD ports tree and provides a way to compile packages from source (some are even hosted as bottles... no compiling required). It is an excellent tool to download and install libraries and do development with. Will Apple keep all those tools around? Only time will tell, but so far it is looking good and I don't think it is in their best interest to move away from it.
I absolutely love HomeBrew, it is modeled a lot after MacPorts/FreeBSD ports tree and provides a way to compile packages from source (some are even hosted as bottles... no compiling required). It is an excellent tool to download and install libraries and do development with. Will Apple keep all those tools around? Only time will tell, but so far it is looking good and I don't think it is in their best interest to move away from it.