Some of the clients have integrated wallets such as nostr:npub1tm99pgz2lth724jeld6gzz6zv48zy6xp4n9xu5uqrwvx9km54qaqkkxn72 and Olas.

For web or PWA you can use https://wallet.cashu.me/welcome

I use eNuts for iOS and it is good so far.