Thanks for the pointers. Here's a few more projects that try to solve real problems that Bitcoin doesn't try to solve:

Handshake - censorship resistant DNS

Arweave - permanent web storage (aims for at least 200 years)

Chia - novel, low cost consensus mechanism

Filecoin - low cost, decentralized storage

Zcash - privacy

Chainlink - Oracle services

Nym - incentivized mixnet

Kleros - decentralized dispute resolution

Tari - private NFT's