My favorite ICO is ongoing: AppCoins. It is a crypto asset aimed for the app economy and backed by a 200 million users company. Their goal is to solve some big issues in the app industry, such as advertising and in-app purchase. I read their white paper and it is interesting how they approach the three main players in the app ecosystem (developers, user and OEM). You might consider taking a look at it: https://appcoins.io/