i may be remembering wrong, but i feel pretty sure NEST Home plugin
was in the plugin store at one point. it's not there now, it must have been removed at some point. additionally, i think "Nest" was one of the logos included, for example, on
this page. (it's definitely not there now.)
warning: rant follows (sorry)....
this plugin for me opened my eyes to the great potential of plugins to add value to Indigo. it was easy to use, provided very elegant and clean integration. it worked flawlessly. it even had great documentation. the gradual decay of the plugin due to neglect/abuse by Google and by the departure of the plugin developer was a disappointment to me.
this represented the worst-case scenario of modern HA for me - i tried out a product, i found a good working solution, i made a choice to make a substantial investment in products (thermostats, smoke detectors), then support was (essentially) yanked with no real alternative provided, other than to switch to a completely different parent HA system.