The following top-10 is based on the internet scan from Dec 30 2018, filtered on UnrealIRCd 4.x (1214 servers):
- m_netadmins: Implements kill and *:Line protection for privileged opers
- m_listrestrict: Impose certain restrictions on /LIST usage
- m_block_masshighlight: Prevent mass highlights network-wide
- m_storetkl: Store TKL entries persistently across IRCd restarts
- m_joinmute: Adds +J chmode: Mute newly joined people for +J X seconds
- m_pmdelay: Disallow new clients trying to send private messages until exceeding a certain timeout
- m_chansno: Allows you to assign channels for specific server notifications (sort of like snomasks)
- m_auditorium: Channel mode +u to show channel events/messages to/from people with +o/+a/+q only
- m_operpasswd: Snomask for failed OPER attempts with the ability to kill
- m_anticaps: Block messages that contain a configurable amount of capital letters