There are a few ways to get in touch with the ivatar/libravatar developers:

IRC

You can join the Libravatar community chat at #libravatar:matrix.org. It is also bridged to #libravatar on irc.libera.chat for those prefering IRC.
Please keep in mind that you may live in a different timezone than most of the developers. So if you do not get a response, it's not because we're ignoring you, it's probably because we're sleeping :)

Bug tracker

If you have a question about a particular bug, or some feedback on it, the best thing to do is to comment on that bug itself.
We use the bugtracker included in our GitLab instance.

Mailing list

If you've got a proposal to discuss or prefer to write to us, you can join our developers mailing list.

Identica / Twitter

You can also put short notices to our attention on Identica or Twitter.

Mastodon

Our Mastodon profile is available on https://photog.social/@libravatar.

Email

Finally, if you need to email us: dev@libravatar.org