I'd have to say my Nokia N900 (to a lesser extent my N9). Namely because much like the devices (computers in the Amiga's case) back in the day, it was the only one that did multitasking well (well, if you ignore the Unix machines that no one could afford) but the N900 also really multitasks, where Android and iOS just pretend to (yeah still).
It's also much like the Amiga in that the company that was over it had gold, and didn't know how to mine it properly. Commodore floundered the Amiga IP just like Nokia burned Maemo/MeeGo.
And much like my Amiga, I still have my N900 sitting around waiting for me to get a dremel so I can get those damned tiny stripped screws out... well okay, my Amiga doesn't have stripped screws, but they're both sitting on the desk right now. hmm, time to fire up some old games 
slaapliedje
+1 for my Nokia N9. Dead platform, but users and developers enjoying the power of the OS (the concept, the configurability, the speed, etc), active coding community coding alternatives to common android/ios apps (because of the lack of official support) and a proud community. At that, very interested in the upcoming Jolla phone.
