Pierre Rochard from BitcoinAdvisory.com wrote a great series of articles where he covers in details his participation at the ChainCode Labs Lightning residency event.
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There are three different implementations of the Lightning Network. So far two of them have already reached mainnet beta phase (lnd and Eclair), while the last one (c-lightning) is still at the pre-beta phase. Although this is a big step for Lightning technology adoption, it will take some time until the first user-friendly wallets and applications will be available on the mainnet.