diff --git a/r2chat.py b/r2chat.py
index 8f6ce6b..970d2eb 100644
--- a/r2chat.py
+++ b/r2chat.py
@@ -27,7 +27,10 @@ except:
     CHANNEL = 'chat'
     CHANCHAN = 'chat'
 
-CHAT_FILE = ROOT / "r2chat" / f"{CHANNEL}.txt"
+CHANNELS_DIR = ROOT / "r2chat"
+CHAT_FILE = CHANNELS_DIR / f"{CHANNEL}.txt"
+INSTANCE_DIR = CHANNELS_DIR / "instance"
+os.makedirs(INSTANCE_DIR, exist_ok=True)
 CONFIG_FILE = Path.home() / "r2chat.config.json"
 os.makedirs(os.path.dirname(CHAT_FILE), exist_ok=True)
 
@@ -36,6 +39,8 @@ COLOR_PATTERN = re.compile(r"\(\((#[0-9a-fA-F]{6})\s*\|\s*([^)]+)\)\)")
 status = "online"
 
 username = getpass.getuser()
+USERFILE = INSTANCE_DIR / f"{username}.json"
+
 media.mixer.init()
 
 DEFAULT_CONFIG = {
@@ -80,6 +85,13 @@ class r2chat:
         bg_color = self.cfg["bg_color"]
         fg_color = self.cfg["fg_color"]
 
+        self.user_data = self.load_userdata()
+        if CHANNEL not in self.user_data["channels"]:
+            self.user_data["channels"].append(CHANNEL)
+
+        self.user_data["status"] = status
+        self.save_userdata(self.user_data)
+
         # menubar
         self.menubar = tk.Menu(root)
         self.root.config(menu=self.menubar)
@@ -87,8 +99,9 @@ class r2chat:
         ## chat menu
         self.chatmenu = tk.Menu(self.menubar, tearoff=0)
         self.menubar.add_cascade(label="Chat", menu=self.chatmenu)
-        self.chatmenu.add_command(label="Registered users", command=lambda: print(""))
-        self.chatmenu.add_command(label="Leave", command=lambda: self.on_close())
+        self.chatmenu.add_command(label="Registered users", command=lambda: self.show_users())
+        self.chatmenu.add_command(label="Channel list", command=lambda: self.show_channels())
+        self.chatmenu.add_command(label="Leave channel", command=lambda: self.on_close())
 
         ## insert menu
         self.chatmenu = tk.Menu(self.menubar, tearoff=0)
@@ -126,6 +139,13 @@ class r2chat:
 
     def on_close(self):
         self.write_system_message(f'◌ {self.cfg["status_leave"]}')
+
+        if CHANNEL in self.user_data["channels"]:
+            self.user_data["channels"].remove(CHANNEL)
+        if not self.user_data["channels"]:
+            self.user_data["status"] = "offline"
+
+        self.save_userdata(self.user_data)
         self.root.destroy()
 
     def write_system_message(self, msg):
@@ -137,11 +157,7 @@ class r2chat:
         msg = self.entry.get().strip()
         if msg and msg.startswith("/join #"):
             channel = msg[7:len(msg)]
-            self.write_system_message(f"⇄ {username} is chatting in {channel}.")
-            if sys.platform == "win32":
-                subprocess.Popen(f'pythonw "{os.path.abspath(__file__)}" "{channel}"', shell=True)
-            else:
-                subprocess.Popen(f'python "{os.path.abspath(__file__)}" "{channel}"', shell=True)
+            self.open_channel(channel)
             msg = ''
             self.entry.delete(0, tk.END)
         if msg:
@@ -172,6 +188,99 @@ class r2chat:
         elif status == "busy":
             self.write_system_message(msg=f'◎ {self.cfg["status_busy"]}')
 
+        self.user_data["status"] = status
+        self.save_userdata(self.user_data)
+
+    def load_userdata(self):
+        path = USERFILE
+        if path.exists():
+            try:
+                with open(path, "r", encoding="utf-8") as f:
+                    return json.load(f)
+            except:
+                pass
+        return {
+            "username": username,
+            "status": "online",
+            "channels": [],
+            "last_seen": time.time()
+        }
+
+    def save_userdata(self, data):
+        data["last_seen"] = time.time()
+        with open(USERFILE, "w", encoding="utf-8") as f:
+            json.dump(data, f, indent=2)
+
+    def show_users(self):
+        win = tk.Toplevel(self.root)
+        win.title("Registered users")
+        win.geometry("420x320")
+
+        tree = ttk.Treeview(win, columns=("user", "status", "channels", "last_seen"), show="headings")
+
+        tree.heading("user", text="User")
+        tree.heading("status", text="Status")
+        tree.heading("channels", text="Channels")
+        tree.heading("last_seen", text="Last seen")
+
+        tree.column("user", width=80)
+        tree.column("status", width=60, anchor="center")
+        tree.column("channels", width=140)
+        tree.column("last_seen", width=120, anchor="e")
+
+        tree.pack(fill=tk.BOTH, expand=True, padx=10, pady=10)
+
+        for file in INSTANCE_DIR.glob("*.json"):
+            try:
+                with open(file, "r", encoding="utf-8") as f:
+                    data = json.load(f)
+
+                last_seen = time.strftime("%H:%M:%S", time.localtime(data.get("last_seen", 0)))
+                channels = ", ".join(data.get("channels", []))
+
+                tree.insert("", tk.END, values=(
+                    file.stem,
+                    data.get("status", "?"),
+                    channels,
+                    last_seen
+                ))
+            except Exception as e:
+                print(":( user read error:", e)
+
+    def show_channels(self):
+        win = tk.Toplevel(self.root)
+        win.title("Channel list")
+        win.geometry("200x320")
+
+        tree = ttk.Treeview(win, columns=("channel"), show="headings")
+        tree.heading("channel", text="Channels")
+        tree.column("channel", width=100)
+        tree.pack(fill=tk.BOTH, expand=True, padx=10, pady=10)
+
+        for file in CHANNELS_DIR.glob("*.txt"):
+            try:
+                tree.insert("", tk.END, values=(
+                    file.stem.replace("chat_", "")
+                ))
+            except Exception as e:
+                print(":( instance read error:", e)
+
+        def on_select(event):
+            selected = tree.focus()
+            if selected:
+                channel = tree.item(selected)["values"][0]
+                win.destroy()
+                self.open_channel(channel)
+
+        tree.bind("<Double-1>", on_select)
+
+    def open_channel(self, channel):
+        self.write_system_message(f"⇄ {username} is chatting in {channel}.")
+        if sys.platform == "win32":
+            subprocess.Popen(f'pythonw "{os.path.abspath(__file__)}" "{channel}"', shell=True)
+        else:
+            subprocess.Popen(f'python "{os.path.abspath(__file__)}" "{channel}"', shell=True)
+
     def openprefs(self):
         PreferencesWindow(self.root, self.cfg, self.save_prefs)