Tools we like

Table of contents

Front end tooling
Ethereum-related tooling
Contract development
Project management

Front end tooling

Mobile

React Native
Expo to make it easier to iterate on top of React Native
React Navigation

Web

React (using Hooks)
Create React App to handle build configuration
emotion for styling components on the web with css-in-js
React Router v5 for client-side routing
Rebass for responsive grid and base component library
GitHub Pages for hosting

Cross-platform

TypeScript
Apollo Client for querying for indexed data from smart contracts using GraphQL

Ethereum-related tooling

web3-react as an abstraction that lets us easily swap in and out web3 providers (MetaMask, WalletConnect, etc.) and a dev-friendly context containing an instantiated ethers.js instance, the current account, and network id available globally throughout the dapp via a React Context.
ethers.js v4/v5 for writing data to the contracts
The Graph for indexing data from the contracts
Contract-based accounts like Gnosis Safe, Argent, Abridged, Authereum, and Universal Login
ENS

Contract development

Project management

Canny for feature requests