There are a couple of unique coins to mention that many people would like:
Gridcoin can run on any standard PC and rewards users for doing scientific research, like searching for cures to AIDS, Ebola, TB, Zika etc.
Solarcoin rewards users fo generating solar energy, the community has some amazing spin off projects like ElectriCChain.org which is recording solar power production in real time onto the blockchain with IoT data loggers.
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