OnApp virtual server templates are pre-configured operating system environments that deploy in a couple of clicks.
With the full version of OnApp Cloud you get a set of base templates for your installation, and free access to a huge library of Windows, Linux and FreeBSD templates. You can also get access to the JumpBox library of Open Source web applications for a discounted monthly fee. The free version of OnApp Cloud gives you the base templates only.
All templates work with Xen and KVM hypervisors unless noted.
For the list of OnApp templates, refer to http://templates.repo.onapp.com/
Windows Server 2003/XP OSs come to their end-of-life on July 14th, 2015 and will no longer be supported.