Gifted Chat (UI only)

https://github.com/FaridSafi/react-native-gifted-chat

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Rocket Chat

https://github.com/RocketChat/Rocket.Chat.ReactNative

https://summerofcode.withgoogle.com/archive/2021/organizations/6240940410273792

Zulip

https://github.com/zulip/zulip-mobile

https://summerofcode.withgoogle.com/programs/2022/organizations/zulip

Stream Chat

RN Chat SDK ➜ Stream Chat. Includes tutorial w React-Native, React-Navigation and Stream

https://github.com/GetStream/stream-chat-react-native

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Jitsi Meet

RN wrapper for Jitsi Meet SDK

https://github.com/skrafft/react-native-jitsi-meet

https://summerofcode.withgoogle.com/programs/2022/organizations/jitsi