Open source wallets:

https://www.monerujo.io/ (Android only)

https://stackwallet.com/ (Bitcoin/Monero only version available - Android, iOS)

https://cakewallet.com/ (Monero only version available - Desktop, Android, iOS)

https://featherwallet.org/ (Desktop only)

https://www.getmonero.org/downloads/ (Desktop only)

Fiat -> Monero:

https://localmonero.co/ (noKYC)

https://www.kraken.com/ (KYC)

BTC -> Monero:

https://bisq.network

https://trocador.app/en/

https://unstoppableswap.net/

https://kycnot.me/?xmr=on

Buy Monero gift cards for almost anything:

https://coincards.com/us/

Spend Monero directly:

https://monerica.com/

https://moneromarket.io/

https://kycnot.me/services?xmr=on

...and Darknet Markets!

Hope this is useful to you