VMware released nine plug-ins for vCenter Orchestrator this year (and there is more than a quarter left !) and decided that it would be best for customers to have all of the docs gathered in one place in a more user friendly and searchable format.
vCenter Orchestrator Plug-ins Documentation Center allows from one single page to browse the different plug-ins documentation.
Also these documentation guides are also made available in .epub and .mobi formats. These file formats allow to read the documentation on their mobile devices and Kindles.
For more information check the vCenter Orchestrator Plug-ins Documentation Center.