I've been using Riot for a few years and it's nice, but it would've been nice to know that there is a modern Weechat plugin implementation (I was half considering writing one myself).
It's also super neat to see that they wrote their own Python Matrix client library[3], which is something I also needed for another idea I'm working on (the library linked to from the Matrix site also seems to be less suitable than this one).
[1]: https://matrix.org/docs/projects/try-matrix-now [2]: https://github.com/torhve/weechat-matrix-protocol-script [3]: https://github.com/poljar/matrix-nio