minibits.cash/Bitcoin is a reliable and stable mint that's very popular. It's the default mint in many ecash wallets.

mint.utxo.one is another solid mint run by nostr:nprofile1qqsw9n8heusyq0el9f99tveg7r0rhcu9tznatuekxt764m78ymqu36cpz4mhxue69uhhyetvv9ujuat50phjummwv5hszymhwden5te0wahhgtn4w3ux7tn0dejj7qg4waehxw309an8yetwwvh82arcduhx7mn99uuwx66a He's a stand-up dude who is trustworthy and committed to the operation of his various projects, so you can trust this one.

Anothet trustworthy mint is mint.0xchat.com As the name implies, it's run by 0xChat, and is the default mint for the 0xChat app.

Finally, a newcomer. mint.coinos.io run by Coinos.io. They're a bitcoin/e-commerce platform that offers a nice web-wallet that has become very popular. Their mint is the default for their platform, so I consider it a safe, reliable mint to hold your sats.