I2P support forum

You can browse the published address book with an in-proxy. I don't know how long this will work or if meek will change his mind. I do not run in-proxies but if your router has problems http://thesiteyouwanttobrowse.onion.guide works at this time. Some sites such as zzz are configured to be accessed only with a router or ... tricks.

Unrelated to i2p http://zlal32teyptf4tvi.onion.guide/ is a compilation of new ideas mostly for Tor. It uses the v2 the older less secure connection but ... with a little skill you can mitigate that.