Ubiq (UBQ) is the mineable coin supported by the number of exchanges. Running the “Ethereum Virtual machine”, Ubiq provides developers with the tools to create smart contracts.
Arweave aims to make information permanence sustainable. Arweave describes itself as a new type of storage that backs data with sustainable and perpetual endowments, allowing users and developers to store data forever. As a collectively owned hard drive that never forgets, Arweave aims to allow users to remember and preserve valuable information, apps, and history indefinitely. By preserving history, it prevents others from rewriting it.