A simple smart contract interface for swapping ERC20 tokens. Uniswap is open source and functions as a public good. There is no central token or platform fee. No special treatment is given to early investors, adopters, or developers. Token listing is open and free. All smart contract functions are public and all upgrades are opt-in.
RainbowKit
uniswap going to be an ETH staple 2019
Pros:fast, super cheap, clean UX
Cons:still early days and needs some more volume!
BUIDL
A clever design which hits at all of the fundamentals of a good decentralized exchange application. No user log in required, no information stored off-chain by third-parties, no order books, just put something in and something else comes out. Simple!
Pros:Open source code, mobile compliant frontend, Vyper smart contracts under the hood, cheap, fast, 100% on-chain, no offline order books ...
Cons:Very early days but that will all turnaround :)