There has been a Host Client fling for some time which is the HTML5-based web client for ESXi hosts. As of 6.0 Update 2 this client has now been pulled into ESXi and is a fully supported feature (http://blogs.vmware.com/vsphere/2016/03/vmware-host-client-1-0-now-ga.html). The feedback on both the Host Client and HTML5 Web Client has actually been really positive so far but I invite you to make your own conclusions after trying either (or both!).
--Adam Eckerle, @eck79 [VMware employee]
Biting the hand that feeds IT
