Here are some interesting Bitcoin loan and exchange services:
CoinLoan allows you to get loans in USD while continuing to hold your digital assets.
tBTC is an ERC-20 token on Ethereum. It is trustlessly redeemable for Bitcoin (BTC). In other words, you can deposit Bitcoin and mint Bitcoin tokens on Ethereum without a middleman or identifying yourself.
RenBridge a decentralized application (dApp) that allows you to mint BTC, ZEC, and BCH on Ethereum as an ERC20 token (renBTC, renZEC, renBCH). You can = convert these ERC20s (renBTC, renZEC, renBCH) back to real BTC, BCH, and ZEC.
FixedFloat is an automated digital asset exchange that uses the Bitcoin Lightning Network.
Liquidity Atom Swap
The Liquidity service offers an Atomic Swap Interface for users to atomic swap using their Ledger or MetaMask wallets.