Here is a list of various OIDplus installations found on the World Wide Web.
At the ViaThinkSoft Registration Authority, ViaThinkSoft is managing its Object Identifiers. Using a special plugin, individual persons or small organizations can obtain a free OID inside the OID tree of ViaThinkSoft. The owners of these OIDs can manage their OID allocations using OIDplus.
The Demo Registration Authority is an OIDplus installation that shows off various features of OIDplus without containing productive data.
The Frdlweb / Webfan Registration Authority is operated by "Webfan Domain und Homepagespeicher". Besides Object Identifiers, several other object types are managed by OIDplus. For example, a special subset of Object Identifiers, called "WEID", which can also be obtained free of charge using customized plugins.