diff --git a/HarshTamboli/NumberGuessingGame.java b/HarshTamboli/NumberGuessingGame.java
new file mode 100644
index 0000000..de0279f
--- /dev/null
+++ b/HarshTamboli/NumberGuessingGame.java
@@ -0,0 +1,28 @@
+package HarshTamboli.NumberGuessingGame;
+import java.util.Random;
+import java.util.Scanner;
+
+public class NumberGuessingGame {
+    public static void main(String args[]) {
+        Random random = new Random();
+        Scanner scanner = new Scanner(System.in);
+        int chances = 5;
+        int randomNumber = random.nextInt(100);
+        
+        System.out.println("Welcome to the Number Guessing Game!");
+        System.out.println("You have " + chances + " chances to guess the number.");
+
+        for (int i = 0; i < chances; i++) {
+            System.out.println("Enter your guess (between 0 and 99):");
+            int guess = scanner.nextInt();
+
+            if (guess == randomNumber) {
+                System.out.println("Congratulations! You guessed it right!");
+                break;
+            } else {
+                System.out.println("Incorrect guess. You have " + (chances - i - 1) + " chances left.");
+            }
+        }       
+        scanner.close();
+    }
+}
\ No newline at end of file
diff --git a/HarshTamboli/SimpleCalculator.java b/HarshTamboli/SimpleCalculator.java
new file mode 100644
index 0000000..c7d9c7c
--- /dev/null
+++ b/HarshTamboli/SimpleCalculator.java
@@ -0,0 +1,44 @@
+package HarshTamboli.SimpleCalculator;
+import java.util.Scanner;
+public class SimpleCalculator {
+        public static void main(String args[]) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Simple Calculator");
+        System.out.println("Enter the first number:");
+        double num1 = scanner.nextDouble();
+        System.out.println("Enter the second number:");
+        double num2 = scanner.nextDouble();
+        System.out.println("Select operation:");
+        System.out.println("1. Addition (+)");
+        System.out.println("2. Subtraction (-)");
+        System.out.println("3. Multiplication (*)");
+        System.out.println("4. Division (/)");
+        int choice = scanner.nextInt();
+        double result;
+        switch (choice) {
+            case 1:
+                result = num1 + num2;
+                System.out.println("Result: " + result);
+                break;
+            case 2:
+                result = num1 - num2;
+                System.out.println("Result: " + result);
+                break;
+            case 3:
+                result = num1 * num2;
+                System.out.println("Result: " + result);
+                break;
+            case 4:
+                if (num2 == 0) {
+                    System.out.println("Error: Division by zero");
+                } else {
+                    result = num1 / num2;
+                    System.out.println("Result: " + result);
+                }
+                break;
+            default:
+                System.out.println("Invalid choice");
+        }
+        scanner.close();
+    }
+}
\ No newline at end of file
diff --git a/HarshTamboli/TemperatureConverter.java b/HarshTamboli/TemperatureConverter.java
new file mode 100644
index 0000000..5711693
--- /dev/null
+++ b/HarshTamboli/TemperatureConverter.java
@@ -0,0 +1,87 @@
+package HarshTamboli.TemperatureConverter;
+import java.util.Scanner;
+public class TemperatureConverter {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Temperature Converter");
+        System.out.println("Choose the original temperature scale:");
+        System.out.println("1. Celsius");
+        System.out.println("2. Fahrenheit");
+        System.out.println("3. Kelvin");
+        int originalScale = scanner.nextInt();
+
+        System.out.println("Enter the temperature:");
+        double temperature = scanner.nextDouble();
+
+        System.out.println("Choose the target temperature scale:");
+        System.out.println("1.Celsius");
+        System.out.println("2.Fahrenheit");
+        System.out.println("3.Kelvin");
+        int targetScale = scanner.nextInt();
+
+        double convertedTemperature = convertTemperature(temperature, originalScale, targetScale);
+
+        System.out.println("Converted temperature:" + convertedTemperature);
+
+        scanner.close();
+    }
+
+    public static double convertTemperature(double temperature, int originalScale, int targetScale) {
+        switch (originalScale) {
+            case 1:
+                switch (targetScale) {
+                    case 1:
+                        return temperature;
+                    case 2:
+                        return celsiusToFahrenheit(temperature);
+                    case 3: // Celsius to Kelvin
+                        return celsiusToKelvin(temperature);
+                }
+            case 2: 
+                switch (targetScale) {
+                    case 1:
+                        return fahrenheitToCelsius(temperature);
+                    case 2:
+                        return temperature;
+                    case 3: 
+                        return fahrenheitToKelvin(temperature);
+                }
+            case 3: // Kelvin
+                switch (targetScale) {
+                    case 1: 
+                        return kelvinToCelsius(temperature);
+                    case 2:
+                        return kelvinToFahrenheit(temperature);
+                    case 3:
+                        return temperature;
+                }
+            default:
+                return 0.0;
+        }
+    }
+
+    public static double celsiusToFahrenheit(double celsius) {
+        return (celsius * 9 / 5) + 32;
+    }
+
+    public static double celsiusToKelvin(double celsius) {
+        return celsius + 273.15;
+    }
+
+    public static double fahrenheitToCelsius(double fahrenheit) {
+        return (fahrenheit - 32) * 5 / 9;
+    }
+
+    public static double fahrenheitToKelvin(double fahrenheit) {
+        return (fahrenheit + 459.67) * 5 / 9;
+    }
+
+    public static double kelvinToCelsius(double kelvin) {
+        return kelvin - 273.15;
+    }
+
+    public static double kelvinToFahrenheit(double kelvin) {
+        return (kelvin * 9 / 5) - 459.67;
+    }
+}
\ No newline at end of file
diff --git a/HarshTamboli/ToDoList.java b/HarshTamboli/ToDoList.java
new file mode 100644
index 0000000..a312b95
--- /dev/null
+++ b/HarshTamboli/ToDoList.java
@@ -0,0 +1,59 @@
+package HarshTamboli.ToDoList;
+import javafx.application.Application;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.ListView;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage; 
+
+public class ToDoList extends Application {
+    private ListView<String> listView;
+    private TextField taskInput;
+
+    @Override
+    public void start(Stage primaryStage) {
+        BorderPane root = new BorderPane();
+        listView = new ListView<>();
+        taskInput = new TextField();
+        taskInput.setPromptText("Enter a new task");
+        Button addButton = new Button("Add");
+        addButton.setOnAction(e -> addTask());
+        Button deleteButton = new Button("Delete");
+        deleteButton.setOnAction(e -> deleteTask());
+        HBox inputBox = new HBox(10, taskInput, addButton, deleteButton);
+        inputBox.setAlignment(Pos.CENTER);
+        inputBox.setPadding(new Insets(10));
+        VBox centerBox = new VBox(10, listView, inputBox);
+        centerBox.setPadding(new Insets(10));
+        root.setCenter(centerBox);
+        Scene scene = new Scene(root, 300, 400);
+        primaryStage.setTitle("ToDo List");
+        primaryStage.setScene(scene);
+        primaryStage.show();
+    }
+
+    private void addTask() {
+        String taskDescription = taskInput.getText().trim();
+        if (!taskDescription.isEmpty()) {
+            listView.getItems().add(taskDescription);
+            taskInput.clear();
+        }
+    }
+
+    private void deleteTask() {
+        int selectedIndex = listView.getSelectionModel().getSelectedIndex();
+        if (selectedIndex != -1) {
+            listView.getItems().remove(selectedIndex);
+        }
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}
\ No newline at end of file