diff --git a/hid/main.go b/hid/main.go
index 75f4231..4c9176b 100644
--- a/hid/main.go
+++ b/hid/main.go
@@ -556,14 +556,40 @@ func initiateQuit() {
 	quitting = true
 }
 
-// TODO: ircChannelCreate
-
-func ircChannelDestroyIfEmpty(ch *channel) {
-	// TODO
+func ircChannelCreate(name string) *channel {
+	ch := &channel{
+		name:      name,
+		created:   time.Now().UnixNano(),
+		userLimit: -1,
+	}
+	channels[ircToCanon(name)] = ch
+	return ch
 }
 
+func ircChannelDestroyIfEmpty(ch *channel) {
+	if len(ch.userModes) == 0 {
+		delete(channels, ircToCanon(ch.name))
+	}
+}
+
+// TODO: Improve the name as it takes mode +q into account.
 func ircSendToRoommates(c *client, message string) {
-	// TODO
+	targets := make(map[*client]bool)
+	for _, ch := range channels {
+		_, present := ch.userModes[c]
+		if !present || 0 != ch.modes&ircChanModeQuiet {
+			continue
+		}
+		for client := range ch.userModes {
+			targets[client] = true
+		}
+	}
+
+	for roommate := range targets {
+		if roommate != c {
+			roommate.send(message)
+		}
+	}
 }
 
 // --- Clients (continued) -----------------------------------------------------
@@ -1662,13 +1688,248 @@ func ircHandleTOPIC(msg *message, c *client) {
 	ircChannelMulticast(ch, message, nil)
 }
 
-// TODO: All the various real command handlers.
+func ircTryPart(c *client, target string, reason string) {
+	if reason == "" {
+		reason = c.nickname
+	}
 
-func ircHandleX(msg *message, c *client) {
+	ch := channels[ircToCanon(target)]
+	if ch == nil {
+		c.sendReply(ERR_NOSUCHCHANNEL, target)
+		return
+	}
+
+	if _, present := ch.userModes[c]; !present {
+		c.sendReply(ERR_NOTONCHANNEL, target)
+		return
+	}
+
+	message := fmt.Sprintf(":%s@%s@%s PART %s :%s",
+		c.nickname, c.username, c.hostname, target, reason)
+	if 0 == ch.modes&ircChanModeQuiet {
+		ircChannelMulticast(ch, message, nil)
+	} else {
+		c.send(message)
+	}
+
+	delete(ch.userModes, c)
+	ircChannelDestroyIfEmpty(ch)
+}
+
+func ircPartAllChannels(c *client) {
+	for _, ch := range channels {
+		if _, present := ch.userModes[c]; present {
+			ircTryPart(c, ch.name, "")
+		}
+	}
+}
+
+func ircHandlePART(msg *message, c *client) {
 	if len(msg.params) < 1 {
 		c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
 		return
 	}
+
+	reason := ""
+	if len(msg.params) > 1 {
+		reason = msg.params[1]
+	}
+
+	for _, target := range splitString(msg.params[0], ",", true) {
+		ircTryPart(c, target, reason)
+	}
+}
+
+// TODO: Undo the rename from channelName to target, also in ircTryPart.
+func ircTryKick(c *client, target, nick, reason string) {
+	ch := channels[ircToCanon(target)]
+	if ch == nil {
+		c.sendReply(ERR_NOSUCHCHANNEL, target)
+		return
+	}
+
+	if modes, present := ch.userModes[c]; !present {
+		c.sendReply(ERR_NOTONCHANNEL, target)
+		return
+	} else if 0 == modes&ircChanModeOperator {
+		c.sendReply(ERR_CHANOPRIVSNEEDED, target)
+		return
+	}
+
+	client := users[ircToCanon(nick)]
+	if _, present := ch.userModes[client]; client == nil || !present {
+		c.sendReply(ERR_USERNOTINCHANNEL, nick, target)
+		return
+	}
+
+	message := fmt.Sprintf(":%s@%s@%s KICK %s %s :%s",
+		c.nickname, c.username, c.hostname, target, nick, reason)
+	if 0 == ch.modes&ircChanModeQuiet {
+		ircChannelMulticast(ch, message, nil)
+	} else {
+		c.send(message)
+	}
+
+	delete(ch.userModes, client)
+	ircChannelDestroyIfEmpty(ch)
+}
+
+func ircHandleKICK(msg *message, c *client) {
+	if len(msg.params) < 2 {
+		c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
+		return
+	}
+
+	reason := c.nickname
+	if len(msg.params) > 2 {
+		reason = msg.params[2]
+	}
+
+	targetChannels := splitString(msg.params[0], ",", true)
+	targetUsers := splitString(msg.params[1], ",", true)
+
+	if len(channels) == 1 {
+		for i := 0; i < len(targetUsers); i++ {
+			ircTryKick(c, targetChannels[0], targetUsers[i], reason)
+		}
+	} else {
+		for i := 0; i < len(channels) && i < len(targetUsers); i++ {
+			ircTryKick(c, targetChannels[i], targetUsers[i], reason)
+		}
+	}
+}
+
+func ircSendInviteNotifications(ch *channel, c, target *client) {
+	for client := range ch.userModes {
+		if client != target && 0 != client.capsEnabled&ircCapInviteNotify {
+			client.sendf(":%s!%s@%s INVITE %s %s",
+				c.nickname, c.username, c.hostname, target.nickname, ch.name)
+		}
+	}
+}
+
+func ircHandleINVITE(msg *message, c *client) {
+	if len(msg.params) < 2 {
+		c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
+		return
+	}
+
+	target, channelName := msg.params[0], msg.params[1]
+	client := users[ircToCanon(target)]
+	if client == nil {
+		c.sendReply(ERR_NOSUCHNICK, target)
+		return
+	}
+
+	if ch := channels[ircToCanon(channelName)]; ch != nil {
+		invitingModes, invitingPresent := ch.userModes[c]
+		if !invitingPresent {
+			c.sendReply(ERR_NOTONCHANNEL, channelName)
+			return
+		}
+		if _, present := ch.userModes[client]; present {
+			c.sendReply(ERR_USERONCHANNEL, target, channelName)
+			return
+		}
+
+		if 0 != invitingModes&ircChanModeOperator {
+			client.invites[ircToCanon(channelName)] = true
+		} else if 0 != ch.modes&ircChanModeInviteOnly {
+			c.sendReply(ERR_CHANOPRIVSNEEDED, channelName)
+			return
+		}
+
+		// It's not specified when and how we should send out invite-notify.
+		if 0 != ch.modes&ircChanModeInviteOnly {
+			ircSendInviteNotifications(ch, c, client)
+		}
+	}
+
+	client.sendf(":%s!%s@%s INVITE %s %s",
+		c.nickname, c.username, c.hostname, client.nickname, channelName)
+	if client.awayMessage != "" {
+		c.sendReply(RPL_AWAY, client.nickname, client.awayMessage)
+	}
+	c.sendReply(RPL_INVITING, client.nickname, channelName)
+}
+
+func ircTryJoin(c *client, channelName, key string) {
+	ch := channels[ircToCanon(channelName)]
+	var userMode uint
+	if ch == nil {
+		if !ircIsValidChannelName(channelName) {
+			c.sendReply(ERR_BADCHANMASK, channelName)
+			return
+		}
+		ch = ircChannelCreate(channelName)
+		userMode = ircChanModeOperator
+	} else if _, present := ch.userModes[c]; present {
+		return
+	}
+
+	_, invitedByChanop := c.invites[ircToCanon(channelName)]
+	if 0 != ch.modes&ircChanModeInviteOnly && c.inMaskList(ch.inviteList) &&
+		!invitedByChanop {
+		c.sendReply(ERR_INVITEONLYCHAN, channelName)
+		return
+	}
+	if ch.key != "" && (key == "" || key != ch.key) {
+		c.sendReply(ERR_BADCHANNELKEY, channelName)
+		return
+	}
+	if ch.userLimit != -1 && len(ch.userModes) >= ch.userLimit {
+		c.sendReply(ERR_CHANNELISFULL, channelName)
+		return
+	}
+	if c.inMaskList(ch.banList) && !c.inMaskList(ch.exceptionList) &&
+		!invitedByChanop {
+		c.sendReply(ERR_BANNEDFROMCHAN, channelName)
+		return
+	}
+
+	// Destroy any invitation as there's no other way to get rid of it.
+	delete(c.invites, ircToCanon(channelName))
+
+	ch.userModes[c] = userMode
+
+	message := fmt.Sprintf(":%s!%s@%s JOIN %s",
+		c.nickname, c.username, c.hostname, channelName)
+	if 0 == ch.modes&ircChanModeQuiet {
+		ircChannelMulticast(ch, message, nil)
+	} else {
+		c.send(message)
+	}
+
+	ircSendRPLTOPIC(c, ch)
+	ircSendRPLNAMREPLY(c, ch, nil)
+	c.sendReply(RPL_ENDOFNAMES, ch.name)
+}
+
+func ircHandleJOIN(msg *message, c *client) {
+	if len(msg.params) < 1 {
+		c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
+		return
+	}
+
+	if msg.params[0] == "0" {
+		ircPartAllChannels(c)
+		return
+	}
+
+	targetChannels := splitString(msg.params[0], ",", true)
+
+	var keys []string
+	if len(msg.params) > 1 {
+		keys = splitString(msg.params[1], ",", true)
+	}
+
+	for i, name := range targetChannels {
+		key := ""
+		if i < len(keys) {
+			key = keys[i]
+		}
+		ircTryJoin(c, name, key)
+	}
 }
 
 func ircHandleSUMMON(msg *message, c *client) {
@@ -1679,11 +1940,63 @@ func ircHandleUSERS(msg *message, c *client) {
 	c.sendReply(ERR_USERSDISABLED)
 }
 
+func ircHandleAWAY(msg *message, c *client) {
+	if len(msg.params) < 1 {
+		c.awayMessage = ""
+		c.sendReply(RPL_UNAWAY)
+	} else {
+		c.awayMessage = msg.params[0]
+		c.sendReply(RPL_NOWAWAY)
+	}
+}
+
+func ircHandleISON(msg *message, c *client) {
+	if len(msg.params) < 1 {
+		c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
+		return
+	}
+
+	var on []string
+	for _, nick := range msg.params {
+		if client := users[ircToCanon(nick)]; client != nil {
+			on = append(on, nick)
+		}
+	}
+	c.sendReply(RPL_ISON, strings.Join(on, " "))
+}
+
+func ircHandleADMIN(msg *message, c *client) {
+	if len(msg.params) > 0 && !isThisMe(msg.params[0]) {
+		c.sendReply(ERR_NOSUCHSERVER, msg.params[0])
+		return
+	}
+	c.sendReply(ERR_NOADMININFO, serverName)
+}
+
+// TODO: All the remaining command handlers.
+
+func ircHandleX(msg *message, c *client) {
+	if len(msg.params) < 1 {
+		c.sendReply(ERR_NEEDMOREPARAMS, msg.command)
+		return
+	}
+}
+
+func ircHandleDIE(msg *message, c *client) {
+	if 0 == c.mode&ircUserModeOperator {
+		c.sendReply(ERR_NOPRIVILEGES)
+		return
+	}
+	if !quitting {
+		initiateQuit()
+	}
+}
+
 // -----------------------------------------------------------------------------
 
 // TODO: Add an index for IRC_ERR_NOSUCHSERVER validation?
 // TODO: Add a minimal parameter count?
-// TODO: Add a field for oper-only commands?
+// TODO: Add a field for oper-only commands? Use flags?
 var ircHandlers = map[string]*ircCommand{
 	"CAP":  {false, ircHandleCAP, 0, 0},
 	"PASS": {false, ircHandlePASS, 0, 0},
@@ -1700,16 +2013,25 @@ var ircHandlers = map[string]*ircCommand{
 	"VERSION":  {true, ircHandleVERSION, 0, 0},
 	"USERS":    {true, ircHandleUSERS, 0, 0},
 	"SUMMON":   {true, ircHandleSUMMON, 0, 0},
+	"AWAY":     {true, ircHandleAWAY, 0, 0},
+	"ADMIN":    {true, ircHandleADMIN, 0, 0},
 
 	"MODE":    {true, ircHandleMODE, 0, 0},
 	"PRIVMSG": {true, ircHandlePRIVMSG, 0, 0},
 	"NOTICE":  {true, ircHandleNOTICE, 0, 0},
+	"JOIN":    {true, ircHandleJOIN, 0, 0},
+	"PART":    {true, ircHandlePART, 0, 0},
+	"KICK":    {true, ircHandleKICK, 0, 0},
+	"INVITE":  {true, ircHandleINVITE, 0, 0},
 	"TOPIC":   {true, ircHandleTOPIC, 0, 0},
 	"LIST":    {true, ircHandleLIST, 0, 0},
 	"NAMES":   {true, ircHandleNAMES, 0, 0},
 	"WHO":     {true, ircHandleWHO, 0, 0},
 	"WHOIS":   {true, ircHandleWHOIS, 0, 0},
 	"WHOWAS":  {true, ircHandleWHOWAS, 0, 0},
+	"ISON":    {true, ircHandleISON, 0, 0},
+
+	"DIE": {true, ircHandleDIE, 0, 0},
 }
 
 func ircProcessMessage(c *client, msg *message, raw string) {
@@ -1739,7 +2061,7 @@ func ircProcessMessage(c *client, msg *message, raw string) {
 	}
 }
 
-// --- ? -----------------------------------------------------------------------
+// --- Network I/O -------------------------------------------------------------
 
 // Handle the results from initializing the client's connection.
 func (c *client) onPrepared(host string, isTLS bool) {