The NNS dapp UI is indeed open sourced. We don鈥檛 accept yet external contributions in this repo but we do already in nns/sns/cmc-js libraries, the API layers of the dapp.
The list of JS repo we have open sourced and developed (since begin of year):
- NNS-dapp frontend: nns-dapp/frontend at main 路 dfinity/nns-dapp 路 GitHub
- ic-js (nns, sns, cmc and utils): GitHub - dfinity/ic-js: Libraries for interfacing with the Internet Computer.
- UI kit: GitHub - dfinity/gix-components: A collection of UI components and visual style for web applications