Postcrossing - A postcard exchange project that invites everyone to send and receive postcards from random places in the world. For free!
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
swap-bot - Swap-bot is a online service that organizes group swaps and a community of creative individuals.
Flyreel - Live video chat with local home pros for help, advice or bids on home projects in minutes!
Random PenPals - Get a quarantine PenPal in 10 seconds
Overnight - Book a last minute room with locals, in seconds.