This list was compiled by Clayton Roche on the Defi Facebook group - (worth joining):
https://www.facebook.com/groups/DeFiUsers/
List of 3rd Party DeFi Tools:
dex.ag - See the best decentralized exchange for your trade. Compares rates on 10 decentralized exchanges. You can chose the lowest one for your trade
Loanscan.io - See current borrow/lend rates for several different crypto defi assets. Chose where to invest your Dai, eth, or other ERC20 coin. 10 different assets across 13 different services.
CompRoi - See your total gains/losses on Compound lending service. Usually dai stable coin has the best rates.
UniswapRoi - See your total gains/losses on Uniswap. You can earn by providing liquidity, under the pooling tab on Uniswap
Trackato - See over-time returns on sites like dYdX where rates fluctuate. This reporting tool will give you rates for selected periods on the dydx site.
DeFi Dashboards
Zerion - See your DeFi activity in a dashboard
DeFi Tracker - dYdX, Compound, Maker, Uniswap
Instadapp - Dashboard to see your CDPs, Compound, & Uniswap activity
CDPSaver - Manage your CDPs & view compound returns, if you use Maker Dao to create dai stable coin.