[daviddias]

Hi, libp2p dev here!

Yes, we use it today! libp2p is the P2P Networking Stack of IPFS that we refactored into its own project so that others could take advantage and be part of its ecosystem as well.

It is what gives IPFS and other projects the P2P connectivity, support for multiple platforms (including Browsers) and more! There are 3 implementations interoperable today at different stages of completion (Go, JS for Node.js & Browser and Rust). Full overview here https://www.youtube.com/watch?v=CRe_oDtfRLw

Also, Chris Pacia recently delivered an amazing talk at QCON about libp2p https://www.infoq.com/presentations/blockchain-libp2p, I totally recommend checking it out.

You can find more talks of examples and use cases at https://libp2p.io/media.

Give it a spin and post feedback on github.com/libp2p. We are also on #libp2p on freenode, come say hi!

[mechnesium]

The only thing I'm missing is a C++ implementation of libp2p.

Ethereum is the only example I've found that comes close, but it's poorly commented and only implements a small set of details of libp2p.

[joshumax]

I use libp2p extensively for an upcoming open source project, Melodyne[1]. While there are some semantics that are annoying to deal with in the Go bindings, it is the most feature-rich p2p library I have discovered to date.

1: https://github.com/joshumax/Melograph/