Postcrossing - A postcard exchange project that invites everyone to send and receive postcards from random places in the world. For free!
CoinBundle - Invest in crypto portfolios with one click and zero fees
swap-bot - Swap-bot is a online service that organizes group swaps and a community of creative individuals.
Coinvision - AI-powered data for the cryptocurrency and ICO market
Random PenPals - Get a quarantine PenPal in 10 seconds
TokenBot - Invest & trade crypto in all your messaging apps