Comment by whataretensors

Anonymous currencies. Dash, monero, zcash.

Feeless transactions. IOTA

Fog/Mist computing. SNM, Golem

Decentralized marketplaces. Many, syscoin is my favorite.

Identity tracking for IOT. Centralized solutions might exist, but WTC and the like are interesting.

Decentralized governance. DASH, Lisk, more