Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
CoinCap.io - Shows the prices of different cryptocurrencies from ShapeShift.
SheetBest - Turn a Google SpreadSheet into a JSON Database API
My Crypto Coin Hub - Track your cryptocurrency portfolio with the ultimate, automatic crypto portfolio tracker
Sheetsu - Turn Google Spreadsheet into API
BitsLeader - Bitsleader is an automated portfolio management tool that is designed for people who can't afford to look at the market 24/7. bitsleader allows them to sleep peacefully. whether it's a long-term investor or short-term.