Perhaps the Gossip client in Rust? Or Iris & Snort with the Alby extension?
Discussion
Can't get Gossip to work, seems buggy. Alby looks convenient but I couldn't get it to connect to my own LN node, and didn't want to make a new account. Can it be used without lightning? Just the Nostr signer?
Haven't used Alby with my lightning node yet, not sure about that. I think Alby came with a LN Address and then associated the Nostr private key with it to sign events. It also supports Wallet Connect.