I got plan9 working on my Raspberry Pi 3B+, including wifi. I used Miller's 9pi.img. Can read webpages with webfs and abaco. Last night I got drawterm working using the instructions on SDF.
SDF Public Access UNIX System - Free Shell Account and Shell Access

abaco gets the Troglodita Seal of Approval.
This drawterm is *really cool*. It automatically mounts my laptop filesystem onto the plan9 cpu (to /mnt/term), so I can copy files back and forth. It's included in debian and ubuntu, so it's simple to set up.
@humberto If you like that, you may like sshfs.
@indirection I do, but it's not included in the 9pi.img

@humberto sshfs is a *nix tool 🙂 I mentioned it for when you're not using Plan 9.

You may want to check out 9front as well. It's much more developed.

@indirection there's a sshfs in 9front, but no wireless driver for the raspberry pi.
@humberto I love how you can play sounds through drawterm too
@glenda first I need to figure out how to play a sound!
@humberto play is all you need
@glenda nope, no play in 9pi.img. Found games/mp3dec, but it says /dev/audio doesn't exist.
Drawterm

@glenda no, even on the pi it says there's no /dev/audio. I don't know if it can recognize the TV on HDMI as a sound sink.

I tried bind -a '#A' /dev, but it doesn't recognize any device.

One thing at a time. I'll try again on 9front when I get a chance to go to the office and plug into Ethernet.