Ricky El-Qasem from Virtual Planet has developed a tool to allow you to create your own Webpage plug-ins to the VMware vSphere client.
Do you have a web management tool that you like to use like VMware View Admin Console? Or perhaps you have a favorite Web site? You can easily create a tabbed plug-in to include those in your client.
El-Qasem said it is a two step process. Step 1 involves creating an xml which is the visual configuration and contains the actual url link to plug-in your website. Step 2 requires you to register the plug-in within the VI SDK.
Download this Plug-In Wizard for vSphere client, here.