My latest invention is Zero Fee Playground:
https://stacker.news/items/805544
Try out bitcoin's latest feature; transactions that pay zero fees to miners!
Discussion
Update: I added an option to use the new P2A address type that was also introduced in v28 (well, actually it was introduced slightly before v28, but it was introduced for use in v28 of bitcoin)
Now you can send/receive money using tb1pfees9rn5nz! Try it!