plainusers

A simple module to list all users not connected over SSL/TLS. Just run /PUSERS or /PLAINUSERS to get a nice lil' list. ;] It attempts to cram as many nicks on one line as it can, to avoid spamming the fuck out of you. Only opers can use it obviously. =]

You can also achieve the same result with the already existing /WHO command but the specific flags you need might be a little hard/confusing to remember (even more so now that WHOX is a thing).