diff --git a/examples/calculator_tools/__init__.py b/examples/calculator_tools/__init__.py
new file mode 100644
index 00000000..71a9e94a
--- /dev/null
+++ b/examples/calculator_tools/__init__.py
@@ -0,0 +1 @@
+# Init file for calculator_tools example module.
diff --git a/examples/calculator_tools/calculator_tools.py b/examples/calculator_tools/calculator_tools.py
new file mode 100644
index 00000000..87ec2692
--- /dev/null
+++ b/examples/calculator_tools/calculator_tools.py
@@ -0,0 +1,57 @@
+# Copyright (C) 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Simple calculator example Fire CLI.
+
+This module demonstrates the use of Fire without specifying a target component.
+All functions become CLI commands when Fire() is invoked in main().
+
+Example usage:
+  calculator_tools add 2 3
+  calculator_tools subtract 10 4
+  calculator_tools multiply 5 6
+  calculator_tools divide 20 5
+"""
+
+import fire
+
+
+def add(a=0, b=0):
+  """Return the sum of a and b."""
+  return a + b
+
+
+def subtract(a=0, b=0):
+  """Return a - b."""
+  return a - b
+
+
+def multiply(a=0, b=0):
+  """Return a * b."""
+  return a * b
+
+
+def divide(a=0, b=1):
+  """Return a / b."""
+  if b == 0:
+    raise ZeroDivisionError("Cannot divide by zero.")
+  return a / b
+
+
+def main():
+  fire.Fire(name='calculator_tools')
+
+
+if __name__ == '__main__':
+  main()
diff --git a/examples/calculator_tools/calculator_tools_test.py b/examples/calculator_tools/calculator_tools_test.py
new file mode 100644
index 00000000..362e560c
--- /dev/null
+++ b/examples/calculator_tools/calculator_tools_test.py
@@ -0,0 +1,42 @@
+# Copyright (C) 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Tests for the calculator_tools module."""
+
+from fire import testutils
+from examples.calculator_tools import calculator_tools
+
+
+class CalculatorToolsTest(testutils.BaseTestCase):
+
+  def testCalculatorTools(self):
+    # add
+    self.assertEqual(calculator_tools.add(2, 3), 5)
+
+    # subtract
+    self.assertEqual(calculator_tools.subtract(10, 4), 6)
+
+    # multiply
+    self.assertEqual(calculator_tools.multiply(5, 2), 10)
+
+    # divide
+    self.assertEqual(calculator_tools.divide(20, 5), 4)
+
+    # division by zero
+    with self.assertRaises(ZeroDivisionError):
+      calculator_tools.divide(10, 0)
+
+
+if __name__ == '__main__':
+  testutils.main()
diff --git a/examples/string_tools/__init__.py b/examples/string_tools/__init__.py
new file mode 100644
index 00000000..856b55c2
--- /dev/null
+++ b/examples/string_tools/__init__.py
@@ -0,0 +1 @@
+# string_tools package for Python Fire examples
diff --git a/examples/string_tools/string_tools.py b/examples/string_tools/string_tools.py
new file mode 100644
index 00000000..2bcf40f8
--- /dev/null
+++ b/examples/string_tools/string_tools.py
@@ -0,0 +1,50 @@
+# Copyright (C) 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""String tools example Fire CLI.
+
+This module demonstrates the use of Fire without specifying a target component.
+By calling Fire() without arguments in main(), all functions defined in this
+module become available as CLI commands.
+
+Example usage:
+  string_tools reverse "Hello World"
+  string_tools uppercase "hello"
+  string_tools count-words "Hello world from Fire"
+"""
+
+import fire
+
+
+def reverse(text=''):
+  """Return the reversed string."""
+  return text[::-1]
+
+
+def uppercase(text=''):
+  """Return the text in uppercase."""
+  return text.upper()
+
+
+def count_words(text=''):
+  """Return the number of words in the text."""
+  return len(text.split())
+
+
+def main():
+  fire.Fire(name='string_tools')
+
+
+if __name__ == '__main__':
+  main()
diff --git a/examples/string_tools/string_tools_test.py b/examples/string_tools/string_tools_test.py
new file mode 100644
index 00000000..701874a1
--- /dev/null
+++ b/examples/string_tools/string_tools_test.py
@@ -0,0 +1,37 @@
+# Copyright (C) 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Tests for the string_tools module."""
+
+from fire import testutils
+
+from examples.string_tools import string_tools
+
+
+class StringToolsTest(testutils.BaseTestCase):
+
+  def testStringTools(self):
+    # reverse
+    self.assertEqual(string_tools.reverse("Hello"), "olleh")
+
+    # uppercase
+    self.assertEqual(string_tools.uppercase("hello"), "HELLO")
+
+    # count_words
+    self.assertEqual(string_tools.count_words("Hello world"), 2)
+    self.assertEqual(string_tools.count_words("one two three four"), 4)
+
+
+if __name__ == '__main__':
+  testutils.main()
diff --git a/examples/time_tools/__init__.py b/examples/time_tools/__init__.py
new file mode 100644
index 00000000..aa4de40e
--- /dev/null
+++ b/examples/time_tools/__init__.py
@@ -0,0 +1 @@
+# Init file for time_tools example module.
diff --git a/examples/time_tools/time_tools.py b/examples/time_tools/time_tools.py
new file mode 100644
index 00000000..3a32eeb9
--- /dev/null
+++ b/examples/time_tools/time_tools.py
@@ -0,0 +1,53 @@
+# Copyright (C) 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Simple time utilities Fire CLI.
+
+This example demonstrates exposing simple time helper functions using Fire.
+Fire() is called with no target component so all functions in this module
+become CLI commands.
+
+Example usage:
+  time_tools now
+  time_tools to-seconds 1 30
+  time_tools add-seconds "2024-01-01 10:00:00" 120
+"""
+
+import fire
+import datetime
+
+
+def now():
+  """Return the current datetime as a string."""
+  return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
+
+def to_seconds(minutes=0, seconds=0):
+  """Return minutes + seconds converted to total seconds."""
+  return minutes * 60 + seconds
+
+
+def add_seconds(time_string="", seconds=0):
+  """Add seconds to a datetime string."""
+  dt = datetime.datetime.strptime(time_string, "%Y-%m-%d %H:%M:%S")
+  new_dt = dt + datetime.timedelta(seconds=seconds)
+  return new_dt.strftime("%Y-%m-%d %H:%M:%S")
+
+
+def main():
+  fire.Fire(name="time_tools")
+
+
+if __name__ == "__main__":
+  main()
diff --git a/examples/time_tools/time_tools_test.py b/examples/time_tools/time_tools_test.py
new file mode 100644
index 00000000..aa058b4b
--- /dev/null
+++ b/examples/time_tools/time_tools_test.py
@@ -0,0 +1,33 @@
+# Copyright (C) 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Tests for the time_tools module."""
+
+from fire import testutils
+from examples.time_tools import time_tools
+
+
+class TimeToolsTest(testutils.BaseTestCase):
+
+  def testToSeconds(self):
+    self.assertEqual(time_tools.to_seconds(1, 30), 90)
+    self.assertEqual(time_tools.to_seconds(0, 45), 45)
+
+  def testAddSeconds(self):
+    result = time_tools.add_seconds("2024-01-01 10:00:00", 120)
+    self.assertEqual(result, "2024-01-01 10:02:00")
+
+
+if __name__ == "__main__":
+  testutils.main()