diff --git a/frontend/api.py b/frontend/api.py
new file mode 100644
index 0000000..e180c72
--- /dev/null
+++ b/frontend/api.py
@@ -0,0 +1,218 @@
+from types import SimpleNamespace
+import urllib
+import requests
+
+DEFAULT_URL = "http://127.0.0.1:8000"
+
+API_TODO_ITEMS_LIST = "api/todo_items/"
+API_TODO_ITEMS_CREATE = "api/todo_items/"
+API_TODO_ITEMS_READ = "api/todo_items/{0}/"
+API_TODO_ITEMS_UPDATE = "api/todo_items/{0}/"
+API_TODO_ITEMS_PARTIAL_UPDATE = "api/todo_items/{0}/"
+API_TODO_ITEMS_DELETE = "api/todo_items/{0}/"
+
+API_LISTS_LIST = "api/lists/"
+API_LISTS_CREATE = "api/lists/"
+API_LISTS_READ = "lists/{0}/"
+API_LISTS_UPDATE = "lists/{0}/"
+API_LISTS_PARTIAL_UPDATE = "lists/{0}/"
+API_LISTS_DELETE = "lists/{0}/"
+
+API_TOKEN = "api/token/"
+
+
+class UserApi(object):
+    def __init__(self, url=DEFAULT_URL, token=None):
+        """
+        Constructor
+
+        Parameters
+        ----------
+        url : str, optional
+            Server url. The default is DEFAULT_URL.
+        token : dict, optional
+            Existing user tokens to bypass authorization.
+            The default is None.
+
+        Returns
+        -------
+        None.
+
+        """
+        self.token = token
+        self.get_api = lambda x: urllib.parse.urljoin(url, x)
+
+    # ToDo - store tokens in config
+    def auth(self, user, passwd):
+        """
+        Authosization
+
+        Parameters
+        ----------
+        user : str
+            Login.
+        passwd : str
+            Password.
+
+        Returns
+        -------
+        dict
+            Generated auth token.
+
+        """
+        token = UserApi._raise_or_return_(
+            requests.post(url=self.get_api(API_TOKEN), json={"username": user, "password": passwd})
+        )
+        self.token = SimpleNamespace(**token)
+        return self.token
+
+    def lists_list(self, **argv):
+        """
+        List all the exsiting to-do lists.
+        Auth required
+
+        Returns
+        -------
+        list
+            to-do lists.
+
+        """
+        return UserApi._raise_or_return_(
+            requests.get(
+                url=self.get_api(API_LISTS_LIST), headers=self._access_token_(), params=argv
+            )
+        )
+
+    def lists_create(self, title="Untitled"):
+        """
+        Create a new to-do list
+        Auth required
+
+        Parameters
+        ----------
+        title : str, optional
+            New list name. The default is "Untitled".
+
+        """
+        return UserApi._raise_or_return_(
+            requests.post(
+                url=self.get_api(API_LISTS_CREATE),
+                json={"title": title},
+                headers=self._access_token_(),
+            )
+        )
+
+    def todo_items_list(self, **argv):
+        """
+        List all the exsiting to-do items.
+        Auth required
+
+        Returns
+        -------
+        list
+            to-do items.
+
+        """
+        return UserApi._raise_or_return_(
+            requests.get(
+                url=self.get_api(API_TODO_ITEMS_LIST), headers=self._access_token_(), params=argv
+            )
+        )
+
+    # def create(self, title="Untitled"):
+    # """
+    # Create a new to-do list
+    # Auth required
+
+    # Parameters
+    # ----------
+    # title : str, optional
+    # New list name. The default is "Untitled".
+
+    # """
+    # response = requests.post(
+    # url=self.get_api(API_LISTS_CREATE), json={"title": title}, headers=self._access_token_()
+    # url=self.get_api(API_TODO_ITEMS_CREATE), json={"title": title}, headers=self._access_token_()
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def read(self, id):
+    # """
+    # Read a to-do list contents
+
+    # Parameters
+    # ----------
+    # id : int
+    # List id.
+
+    # Returns
+    # -------
+    # list
+    # Requested contents
+
+    # """
+    # response = requests.post(
+    # url=self.get_api(API_LISTS_READ).format(id), headers=self._access_token_()
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def update(self, id, title="Untitled"):
+    # """
+    # Add a to-do item to the list
+
+    # Parameters
+    # ----------
+    # id : int
+    # List id.
+    # title : str, optional
+    # To-do item title. The default is "Untitled".
+
+    # """
+    # response = requests.put(
+    # json={"title": title},
+    # url=self.get_api(API_LISTS_UPDATE).format(id),
+    # headers=self._access_token_(),
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def partial_update(self, id, title="Untitled"):
+    # """
+    # Update list item - untrusted
+
+    # """
+    # response = requests.patch(
+    # json={"title": title},
+    # url=self.get_api(API_LISTS_PARTIAL_UPDATE).format(id),
+    # headers=self._access_token_(),
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def delete(self, id):
+    # """
+    # Delete list
+
+    # Parameters
+    # ----------
+    # id : int
+    # List id to delete.
+
+    # """
+    # response = requests.delete(
+    # url=self.get_api(API_LISTS_DELETE).format(id), headers=self._access_token_()
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    def _access_token_(self):
+        if self.token is None:
+            raise RuntimeError("Authosization required for requested operation!")
+        return {"Authorization": f"Bearer {self.token.access}"}
+
+    @staticmethod
+    def _raise_or_return_(response):
+        response.raise_for_status()
+        return response.json()
diff --git a/frontend/api_demo.py b/frontend/api_demo.py
new file mode 100644
index 0000000..f79bbc3
--- /dev/null
+++ b/frontend/api_demo.py
@@ -0,0 +1,48 @@
+from user import User
+
+
+def print_lists(lists):
+    for item in lists:
+        print(f"List: '{item}'", f"Id: {item.id}", "|", "|".join([str(x) for x in item.items]))
+
+
+DEFAULT_URL = "http://127.0.0.1:8000"
+
+user = User(url=DEFAULT_URL)
+user.auth("root", "root")
+
+# Fetch existing lists:
+lists = user.fetchUserLists()
+print("Fecthing...")
+print_lists(lists)
+
+# Remove user list by id:
+user.removeUserList(5)
+lists = user.fetchUserLists()
+print(f"Removing {5}...")
+print_lists(lists)
+
+# Append a new list to user:
+print("Appending list...")
+scroll = user.appendUserList(title="a new list!")
+print_lists(lists)
+
+# Modify list 0:
+print("Modifyng list...")
+lists[0].modify(title="A new title")
+print_lists(lists)
+
+# Append item to list:
+print("Appending item to last list...")
+item = lists[-1].append(text="this is an item")
+print_lists(lists)
+
+# Modifying item
+print("Modifyng appended item...")
+item.modify(finished=True, text="this is an updated item")
+print_lists(lists)
+
+# Removing item at 0
+print("Removing item 0 from list 0...")
+lists[0].remove(0)
+print_lists(lists)
diff --git a/frontend/login.py b/frontend/login.py
new file mode 100644
index 0000000..64ba0e3
--- /dev/null
+++ b/frontend/login.py
@@ -0,0 +1,68 @@
+import tkinter as tk
+from user import User
+import message
+
+
+class LoginFrame(tk.Frame):
+
+    loggedIn = False
+
+    def __init__(self, master=None, url=None) -> None:
+        """
+        Функция инициаизации класса
+        """
+        super().__init__(master)
+
+        # Иницализируем параметры окна
+        self.master = master
+        self.pack(fill=tk.BOTH, expand=1)
+
+        # self.grid(row=0, column=0, sticky=tk.N + tk.S + tk.E + tk.W)
+        # tk.Grid.rowconfigure(master, 0, weight=1)
+        # tk.Grid.columnconfigure(master, 0, weight=1)
+
+        # Иницализируем параметры пользователя
+        self.user = User(url=url)
+
+        # Настраиваем размеры и включаем иницализацию
+        self.initAUTH()
+
+    def login_clicked(self) -> None:
+        """
+        Функция авторизации
+        """
+        try:
+            self.user.auth(self.login.get(), self.password.get())
+            self.loggedIn = True
+        except Exception as ex:
+            print(ex)
+            message.invalid_login()
+
+    def initAUTH(self) -> None:
+        """
+        Создает окно авторизации программы
+        """
+        # Конфигурируем сетку
+        for rows in range(25):
+            tk.Grid.rowconfigure(self, rows, weight=1)
+
+        for columns in range(25):
+            tk.Grid.columnconfigure(self, columns, weight=1)
+
+        # Подпись и поле ввода для логина
+        login_label = tk.Label(self, text="Введите логин")
+        login_label.grid(row=9, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        self.login = tk.Entry(self)
+        self.login.grid(row=10, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        # Подпись и поле ввода для пароля
+        password_label = tk.Label(self, text="Введите пароль")
+        password_label.grid(row=11, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        self.password = tk.Entry(self, show="*")
+        self.password.grid(row=12, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        # Кнопка авториазции
+        btn = tk.Button(self, text="Войти", command=self.login_clicked)
+        btn.grid(row=14, column=12, columnspan=3, rowspan=1, sticky="nsew")
diff --git a/frontend/message.py b/frontend/message.py
new file mode 100644
index 0000000..824d07b
--- /dev/null
+++ b/frontend/message.py
@@ -0,0 +1,20 @@
+from tkinter import messagebox as mb
+
+TITLE_INFO_BOX = "Сообщение!"
+MESSAGE_INVALID_LOGIN = "Неправильный логин или пароль"
+MESSAGE_EMPTY = "Сдесь могло быть ваше сообщение"
+
+
+def infobox(msg: str = None) -> None:
+    """
+    Показывает передаваемое сообщение в messagebox
+
+    :param msg: передаваемое сообщение
+    """
+    if msg is None:
+        msg = MESSAGE_EMPTY
+    mb.showinfo(TITLE_INFO_BOX, msg)
+
+
+def invalid_login():
+    infobox(MESSAGE_INVALID_LOGIN)
diff --git a/frontend/todo_tk.py b/frontend/todo_tk.py
index 41e0e99..831ac6c 100644
--- a/frontend/todo_tk.py
+++ b/frontend/todo_tk.py
@@ -1,14 +1,55 @@
 #!/usr/bin/env python3
 
+import sys
 import tkinter as tk
+from login import LoginFrame
+from workspace import WorkSpaceFrame
+
+if "win" in sys.platform.lower():
+    DEFAULT_URL = "http://localhost:8000"
+else:
+    DEFAULT_URL = "http://0.0.0.0:8000"
+
+BASE_W = 580
+BASE_H = 400
+
+TITLE_APP = "ToDo Application"
 
 
-class Application(tk.Frame):
-    def __init__(self, master=None):
-        super().__init__(master)
+class Application(tk.Tk):
+    def __init__(self):
+        super().__init__()
+        self.center_window()
+        self.title(TITLE_APP)
+
+    def login(self):
+        """Возвращает пользователя - его можно потом сериализовать"""
+        self.frame = LoginFrame(master=self, url=DEFAULT_URL)
+        while not self.frame.loggedIn:
+            self.update_idletasks()
+            self.update()
+        self.frame.destroy()
+        return self.frame.user
+
+    def main(self, user):
+        self.frame = WorkSpaceFrame(master=self, user=user)
+        self.mainloop()
+
+    def center_window(self, width: str = BASE_W, heigh: str = BASE_H) -> None:
+        """
+        Центрирует приложение по центру экрана
+
+        :param width: ширина окна
+        :param heigh: высота окна
+        """
+        sw = self.winfo_screenwidth()
+        sh = self.winfo_screenheight()
+
+        x = (sw - width) / 2
+        y = (sh - heigh) / 2
+        self.geometry("%dx%d+%d+%d" % (width, heigh, x, y))
 
 
 if __name__ == "__main__":
     app = Application()
-    app.master.title("ToDo")
-    app.mainloop()
+    app.main(app.login())
diff --git a/frontend/user.py b/frontend/user.py
new file mode 100644
index 0000000..5cdff8e
--- /dev/null
+++ b/frontend/user.py
@@ -0,0 +1,108 @@
+import os
+
+from datetime import datetime
+from api import UserApi
+
+
+class ToDoList(object):
+    def __init__(self, id, title, created_at=None, items=[], parent=None):
+        self.id = id
+        self.title = title
+        self.items = items
+        self.created_at = created_at
+
+    def __iter__(self):
+        for item in self.items:
+            yield item
+
+    def __getitem__(self, index):
+        return self.items[index]
+
+    def __len__(self):
+        return len(self.items)
+
+    def __str__(self):
+        return f"[{self.id}] {self.title}"
+
+    def index(self, value):
+        return self.items.index(value)
+
+    # ToDo
+    def remove(self, index):
+        self.items.remove(self.items[index])
+        self.sync()
+
+    # ToDo
+    def append(self, text):
+        item = ToDoItem(id=None, text=text, created_at=datetime.now())
+        self.items.append(item)
+        item.sync()
+        self.sync()
+        return item
+
+    def modify(self, **argv):
+        for key, value in argv.items():
+            setattr(self, key, value)
+        self.sync()
+
+    # ToDo
+    def sync(self):
+        # ToDo send request or store in form
+        print(f"Item '{self}' is being synchronized...")
+
+
+class ToDoItem(object):
+    def __init__(self, id, text, finished=False, created_at=None, parent=None):
+        self.id = id
+        self.text = text
+        self.finished = finished
+        self.created_at = created_at
+
+    def __str__(self):
+        return f"[{self.id}] {self.text}"
+
+    def modify(self, **argv):
+        for key, value in argv.items():
+            setattr(self, key, value)
+        self.sync()
+
+    # ToDo
+    def sync(self):
+        # ToDo send request or store in form
+        print(f"Item '{self}' is being synchronized...")
+
+
+class User(UserApi):
+    def auth(self, user, passwd):
+        if "DEBUG" in os.environ:
+            return
+        UserApi.auth(self, user, passwd)
+
+    # ToDo
+    items = [
+        ToDoList(
+            id=i,
+            title=f"List {i}",
+            created_at=datetime.now(),
+            items=[
+                ToDoItem(id=i * 10 + j, text=f"Item {i*10+j}", created_at=datetime.now())
+                for j in range(10)
+            ],
+        )
+        for i in range(10)
+    ]
+
+    # ToDo
+    def fetchUserLists(self):
+        return self.items
+
+    # ToDo
+    def removeUserList(self, id):
+        self.items = [item for item in self.items if item.id != id]
+
+    # ToDo
+    def appendUserList(self, title):
+        item = ToDoList(id=None, title=title, created_at=datetime.now())
+        self.items.append(item)
+        item.sync()
+        return item
diff --git a/frontend/workspace.py b/frontend/workspace.py
new file mode 100644
index 0000000..34830ec
--- /dev/null
+++ b/frontend/workspace.py
@@ -0,0 +1,163 @@
+import tkinter as tk
+
+
+def str_time(time):
+    return time.strftime("%Y-%m-%d %H:%M:%S")
+
+
+TODO_ITEM_TABLE_TEXT_WIDTH = 15
+TODO_ITEM_TABLE_FINISHED_WIDTH = 8
+TODO_ITEM_TABLE_CREATED_AT_WIDTH = 15
+
+
+def placeholder():
+    print("Не реализовано")
+
+
+class ToDoItemWidget(tk.Frame):
+    @staticmethod
+    def header(parent):
+        body = tk.Frame(parent)
+
+        text = tk.Label(body, text="Текст", width=TODO_ITEM_TABLE_TEXT_WIDTH)
+        text.pack(side="left")
+
+        text = tk.Label(body, text="Выполнено", width=TODO_ITEM_TABLE_FINISHED_WIDTH)
+        text.pack(side="left")
+
+        text = tk.Label(body, text="Создано", width=TODO_ITEM_TABLE_CREATED_AT_WIDTH)
+        text.pack(side="left")
+
+        return body
+
+    def __init__(self, *args, item, **argv):
+        super().__init__(*args, **argv)
+
+        self.parent = self.master
+        self.item = item
+
+        self.noteLabel = tk.Label(self, text=item.text, width=TODO_ITEM_TABLE_TEXT_WIDTH)
+        self.noteLabel.pack(side="left")
+
+        self.finished = tk.IntVar(value=int(item.finished))
+        self.finishedButton = tk.Checkbutton(
+            self,
+            variable=self.finished,
+            command=self.finishedButton_command,
+            width=TODO_ITEM_TABLE_FINISHED_WIDTH,
+        )
+        self.finishedButton.pack(side="left")
+
+        self.createdAt = tk.Label(
+            self, text=str_time(item.created_at), width=TODO_ITEM_TABLE_CREATED_AT_WIDTH
+        )
+        self.createdAt.pack(side="left")
+
+        self.remove = tk.Button(self, text="Удалить", command=lambda: self.parent.remove(self.item))
+        self.remove.pack(side="left")
+
+    def finishedButton_command(self):
+        self.item.modify(finished=self.finished.get() > 0)
+
+
+class ToDoListWidget(tk.Frame):
+    def __init__(self, *args, **argv):
+        super().__init__(*args, **argv)
+
+    def fill(self, itemList):
+
+        header = ToDoItemWidget.header(self)
+        header.pack(side="left")
+        header.pack(side="top", fill="y")
+
+        self.itemList = itemList
+
+        for item in itemList:
+            item = ToDoItemWidget(self, item=item)
+            item.pack(side="top", fill="y")
+
+        self.itemToAdd = tk.Text(self, width=15, height=1)
+        self.itemToAdd.pack(side="top")
+
+        add = tk.Button(self, text="Добавить заметку", command=self.add_command)
+        add.pack(side="top")
+
+        delete = tk.Button(self, text="Удалить лист", command=placeholder)
+        delete.pack(side="top")
+
+    def update(self, itemList=None):
+        self.clear()
+        if itemList is None:
+            self.fill(self.itemList)
+        else:
+            self.fill(itemList)
+
+    def add_command(self):
+        self.itemList.append(self.itemToAdd.get(1.0, "end"))
+        self.update()
+
+    def remove(self, item):
+        self.itemList.remove(self.itemList.index(item))
+        self.update()
+
+    def clear(self):
+        for widget in self.winfo_children():
+            widget.destroy()
+
+
+class WorkSpaceFrame(tk.Frame):
+    def __init__(self, user, master=None, url=None) -> None:
+        """
+        Функция инициаизации класса
+        """
+        super().__init__(master)
+
+        self.master = master
+        self.user = user
+
+        self.pack(fill=tk.BOTH, expand=1)
+        self.initLayout(user)
+
+    def initLayout(self, user):
+
+        # data
+        self.lists = user.fetchUserLists()
+
+        text = tk.Text(self, width=15, height=1)
+        text.pack(anchor="sw")
+
+        add = tk.Button(self, text="Добавить лист", command=placeholder)
+        add.pack(anchor="sw")
+
+        # select list box
+        self.listBox = tk.Listbox(self, width=30, selectmode=tk.SINGLE)
+        self.listBox.pack(side="left", fill="y")
+        self.listBox.bind("<<ListboxSelect>>", self.listBox_selected)
+
+        # scroll bar
+        scrollbar = tk.Scrollbar(self, orient="vertical")
+        scrollbar.config(command=self.listBox.yview)
+        scrollbar.pack(side="left", fill="y")
+
+        # add scroll bar to list box
+        self.listBox.config(yscrollcommand=scrollbar.set)
+
+        # fill list box
+        for item in self.lists:
+            s = f"{str(item)}: {item.created_at.strftime('%Y-%m-%d %H:%M:%S')}"
+            self.listBox.insert(tk.END, s)
+        self.listBox.pack()
+        len(self.lists) > 0 and self.listBox.selection_set(first=0)
+
+        # todo lists
+        self.toToList = ToDoListWidget(self)
+        self.toToList.pack(side="left", fill="both", expand=1)
+
+    def listBox_selected(self, *args):
+
+        self.toToList.clear()
+
+        selection = self.listBox.curselection()
+        cur = selection[0]
+
+        self.toToList.fill(self.lists[cur])