KitRake is a project mainly written in Ruby, it's free.
Rake file for helping managing kits
Rakefile for existing projects that which need a little massaging to turn into a kit.
Kit is a dependency management tool for Obj-C/Xcode projects
Copyright (c) 2011 Kim Hunter.
All rights reserved.
Redistribution and use in source and binary forms are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation, advertising materials, and other materials related to such distribution and use acknowledge that the software was developed by the Kim Hunter. The name of the copyright holder may not be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.