Balancer is an innovative DEX that enables users to provide liquidity with ease. It's totally trust-less and on-chain. Anybody can exchange ERC20 tokens here.
InstaDapp is an asset management platform. Here, you can interact with multiple DeFi platforms in a much easier way as to what you'd get when dealing with each of them individually. Originally, InstaDapp was created as just an interface to activate the functionalities of the underlying platforms.
Synthetix enables users to create the synthetic assets for any underlying. Anybody can do this. All operations are performed on chain with the use of smart contracts. No slippage for trading on the embedded DEX, and the fixed 0.3% fee for both market makers and takers.
Aave is a DeFi lending platform. Here, users can lend and borrow cryptocurrencies in a completely decentralized and trustless manner. There's no AML/KYC process in place which democratizes lending. The project is 8 months old, but it has already garnered a lot of attention in DeFi.
Uniswap is a decentralized crypto exchange (DEX) and it's probably the most popular one in the world of DeFi. There's no order book here and all swaps are run by the automated matchmaker. Anybody can list any ERC20 tokens on Uniswap which makes it the perfect first exchange for startup projects.
Maker is the foundational element of the DeFi niche. Many people use Maker to convert ETH into DAI and proceed with their DeFi Strategies. MakerDAO is a stablecoin system with two coins - DAI (the stablecoin) and MKR (Maker; the governance token)