The following tools are currently used by Google to manage over 64,000 Apple devices with less than a dozen people. They mentioned to avoid sourceforge (because it is full of malware) and to use github instead.

git - free and open source distributed version control system

A collection of Python utilities for Mac OS X system administration

an open-source service monitoring system and time series database

Utilities, tools, and scripts for managing and tracking a fleet of Macintoshes in a corporate environment or this site

• can_haz_image - automation tool for creating images
• crankd - extras crankd to log application usage
• deprecation_notifier - a nagging utility intended to provoke users into doing major OS upgrades
• factor - a simple fact for tracking application usage
• gmacpyutil - python modules with useful methods for managing and controlling Macintosh computers
• macdestroyer - a package that attempts to render the target machine unbeatable
• planb - a host remediation program for managed Macs. Securely downloads disk images from your server and installs contained packages
• run_it - a utility to measure the system impact of a process
• simian - is an enterprise-class Mac OS X software deployment solution
• Munki - is a set of package management tools
• Munki-in-a-box - a quick and fill repository for Munki with AutoPKG
• santa - is a binary whitelisting/blacklisting solution for Mac OS X - monitors execution and notifies user that a binary is blocked
• cauliflower vest - is an end-to-end solution for automatically enabling and escrowing keys for FileVault2
• pymacadmin - is another collection of python utilities for Mac OS X

coming soon:

• installer - netboot in obj-c
• macrestore - allows any mac to restore any other mac

-- EdwardChrzanowski - 2015-07-22