You can now sign in to @buttrfly web app with your Farcaster account custodied by your own external wallet!

Just connect your wallet (rainbow, zerion, cb, mm, any wallet through walletconnect). Buttrfly will detect any farcaster account held by that wallet and will let you create a signer through it to interact with farcaster with zero dependency on Warpcast. Buttrfly is currently the only farcaster client that lets you do this.