These are working as of 2nd July 2021, some dispense once daily, once every hour etc Please return testnet coins when you're done testing so that others can keep building
https://testnet-faucet.mempool.co/
https://coinfaucet.eu/en/btc-testnet/
https://bitcoinfaucet.uo1.net/
https://onchain.io/bitcoin-testnet-faucet
tb1p79rs2l05zettkr6uggyww709x202h65zqp20m0s7awjdwmrgn9rqslgem7