LApp #3 from Blockstream and @shesek is Nanotip, bringing micropayments back to bitcoin one strike at a time. Listen to learn more.

Link to the Blockstream blog and further details on how to setup your own node and begin experimenting with these new additions to the crypto world:
https://blockstream.com/2018/03/24/tipping-on-lightning-with-nanotip-lapp.html