For the most part, the VMware Solution Exchange
should be your one-stop shop for vRealize Orchestrator plug-ins. With that said, this category will provide links to the VMware download site for specific plug-in versions. When adding link to plug-in, please be sure to specify the plug-in version.
I have no affiliation with AVNET, but they appear to be a VMware partner that develops vRO / vCO plug-ins. To see what they have done, what they're working on, or to request custom development, check out http://www.vcoplugins.com/
This Link Category is not a means to bypass VMware logins. Many links here will require a valid account at VMware.com in order to download the VMware provided packages. Versions specified are plug-in versions, not necessarily versions of the plugged in technology. Also, if you are aware of a plug-in that is not listed here, please tweet @TechnicalValues to get it added OR click the Member Login link at the top of the page, then use the menus to Submit A WebLink. Thanks!