midgard 
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midgard is a universal clipboard service, it supports macOS/Linux/Windows/iOS.
Docs
Contributes
Easiest way to contribute is to provide feedback! I would love to hear what you like and what you think is missing. Issue and PRs are also welcome.
Acknowledgment
The author of this project would like to thank Wen Yang and Quancheng Rao for their inspiring discussion and testing in the early stage of the midgard.
License
Copyright 2020-2021 Changkun Ou. All rights reserved.