generate a QR code on the command line for LND
sudo apt-get install qrencode
lncli newaddress np2wkh |jq -c -r .address |qrencode -t ASCII -m 5
MacOS: copy-paste an address or lightning payment request from command line into QREncoder and then scan with Eclair
https://github.com/soldair/node-qrcode
As of 2018-01-25, Android only, neither are particularly great yet