MacPorts

Link: http://www.macports.org/index.php

Intro: The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system. To that end we provide the command-line driven MacPorts software package under a BSD License, and through it easy access to thousands of ports that greatly simplify the task of compiling and installing open-source software on your Mac.

CocoaHTTPServer

Links:
https://github.com/robbiehanson/CocoaHTTPServer
http://cocoawithlove.com/2009/07/simple-extensible-http-server-in-cocoa.html

OpenMobster - Open Source Mobile Enterprise Backend

Link: https://code.google.com/p/openmobster/
Intro:

• OpenMobster, is an open source Enterprise Backend for Mobile Apps, or 
• OpenMobster, is an open source Mobile Backend As a Service that can be deployed privately (on-premise) within your Enterprise or
• OpenMobster, is an open source MEAP (Mobile Enterprise Application Platform).