@coolbean @snacks ergo is the only ircd that does this stuff by default and exclusively. for the ones that federate and are older than ircv3 you will need a bouncer.
soju is a great choice because it also has extensions that allow clients to connect to all configured networks with only one soju connection, and it allows file uploads to a built in http server to share stuff in the easiest and most reliable way possible
mia (developer mode)
@mia@shrimptest.0x0.st