NickServ allows users to register a nickname, and stop others from using that nick. It can permit the owner of a nickname to disconnect a user from the network that is using their nickname. If a registered nick is not used by the owner for 30 days, NickServ will drop the nickname, allowing it to be re-registered.
ChanServ gives normal users the ability to maintain control of a channel, without the need of a bot. Channel takeovers are virtually impossible when a channel is registered with ChanServ. Registration is a quick and painless process. Once registered, the founder can maintain complete and total control over the channel. Please note that channels will expire after 30 days of inactivity, or if there are no eligible channel successors.
MemoServ allows users to send memos to registered users.