(R)?ex is described as '- manage all your boxes from a central point - Datacenter Automation and Configuration Management' and is an app in the Development category. There are more than 25 alternatives to (R)?ex for a variety of platforms, including Linux, Mac, Windows, Online / Web-based and BSD. The best alternative is Ansible, which is both free and Open Source. Other great apps like (R)?ex are Salt (Free, Open Source), Puppet (Freemium, Open Source), Chef (Free, Open Source) and Foreman (Free, Open Source).
Pallet is platform for agile and programmatic automation of infrastructure in the cloud, on server racks or directly on virtual machines. Pallet provides cloud provider and operating system independence, and allows for an unprecedented level of customization.