Add Overcast to Configuration Management section

README.md

@@ -110,6 +110,7 @@ A curated list of amazingly awesome open source sysadmin resources inspired by [
 * [CFEngine](http://cfengine.com/) - Lightweight agent system. Configuration state is specified via a declarative language.
 * [Chef](http://www.opscode.com/chef/) - It's written in Ruby and Erlang and uses a pure-Ruby DSL.
 * [Fabric](http://www.fabfile.org/) - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
+* [Overcast](http://andrewchilds.github.io/overcast/) - Deploy VMs across different cloud providers, and run commands and scripts across any of them via SSH.
 * [Puppet](http://puppetlabs.com/) - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
 * [Salt](http://www.saltstack.com/) - It's written in Python.
 * [Slaughter](http://steve.org.uk/Software/slaughter/) - It's written in Perl.