Feather is a free and open source Monero wallet available on most major computer platforms. Monero is a crypto currency that can be used to conduct transactions anonymously on a peer to peer level without any centralized authority watching over.
LINK: http://featherdvtpi7ckdbkb2yxjfwx3oyvr3xjz3oo4rszylfzjdg6pbm3id.onion/
To access any onion link, you need to use the Tor browser