There is a nice feature - at least in my opinion - in VMware 6.5 that I have seen yesterday: Remote console.
How can I add this feature to vmware 5.5?
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You can download it from VMware and install it on your management workstation in accordance with the instructions.
It requires a minimum vSphere version of 5.5 Update 2b, which is build 2183109, 2183111 or 2183112 depending on how you've installed it. See https://www.vmware.com/support/vsphere5/doc/vsphere-vcenter-server-55u2b-release-notes.html for more details.
BTW, https://kb.vmware.com/kb/1014508 will point you at the right page for all version numbers for all VMware products, should you want to check yourself.