There's a modern Lynx build for Classic Mac.

Also: gopher://magical.fish has tons of services, among gopher://sdf.org for phlogs and gopher://bitreich.org/1/lawn for a big directory.

And, by connecting to the public servers of http://bitlbee.org with any IRC client you can access modern IRC+TLS servers and a good chunk of protocols too (Discord, Mastodon, Steam, Jabber, Linc, Facebook chat, Telegram....)