AirSwap is working to create a decentralized peer-to-peer exchange for ERC-20 tokens. Instead of using a centralized order book to execute trades, AirSwap is developing an indexer that will act like a search engine to connect traders. The AirSwap Oracle gives pricing recommendations in a way that is drastically different than the market maker pricing of centralized exchanges. The exchange is fueled by the AST token, which allows anyone to become a liquidity maker.

Tokens is developing a cryptocurrency exchange for ERC20 tokens that will be powered by their native Dynamic Trading Rights token. Their exchange places a strong emphasis on community driven governance. They have developed a mechanism that allows DTR token holders to be consulted about the future direction of their trading platform and what additional token pairs will be listed.

Kraken is a US-based cryptocurrency exchange and one of the largest bitcoin exchanges in terms of volume and liquidity.
It provides Bitcoin pricing to the Bloomberg Terminal and has considerable influence on the overall crypto market. Kraken offers a number fiat funding and transfer options.
There are 18 BTC pairs and 16 USD pair to trade
Fees vary depending on the volume - for main trading pairs this is between 0.1-0.35% - however for other less common crypto pairs the range can be as low as 0.05% or as high as 0.75%. There are also 0% fees for some trades.
Withdrawals and deposits are variable depending on the method - although in general all fees are 0.19% with a $20 minimum.