diff --git a/comfy_extras/nodes/nodes_generators.py b/comfy_extras/nodes/nodes_generators.py
new file mode 100644
index 000000000..1b538b076
--- /dev/null
+++ b/comfy_extras/nodes/nodes_generators.py
@@ -0,0 +1,124 @@
+from decimal import Decimal
+
+from comfy.node_helpers import export_custom_nodes
+from comfy.nodes.package_typing import CustomNode, InputTypes
+
+
+class IntRange(CustomNode):
+    @classmethod
+    def INPUT_TYPES(cls) -> InputTypes:
+        return {
+            "required": {
+                "start": ("INT", {"default": 0, "step": 0.001}),
+                "end": ("INT", {"default": 1, "step": 0.001}),
+                "step": ("INT", {"default": 1}),
+            }
+        }
+
+    CATEGORY = "generators"
+    OUTPUT_IS_LIST = (True,)
+    RETURN_TYPES = ("INT",)
+    FUNCTION = "execute"
+
+    def execute(self, start: int, end: int, step: int) -> tuple[list[int]]:
+        return list(range(start, end, step)),
+
+
+class FloatRange1(CustomNode):
+    @classmethod
+    def INPUT_TYPES(cls) -> InputTypes:
+        return {
+            "required": {
+                "start": ("FLOAT", {"default": 0.0, "step": 0.001}),
+                "end": ("FLOAT", {"default": 1.0, "step": 0.001}),
+                "step": ("FLOAT", {"default": 1}),
+            }
+        }
+
+    CATEGORY = "generators"
+    OUTPUT_IS_LIST = (True,)
+    RETURN_TYPES = ("FLOAT",)
+    FUNCTION = "execute"
+
+    def execute(self, start: float, end: float, step: float) -> tuple[list[float]]:
+        if step == 0:
+            return [],
+
+        steps = (Decimal(str(end)) - Decimal(str(start))) / Decimal(str(step))
+        return [start + i * step for i in range(int(steps))],
+
+
+class FloatRange2(CustomNode):
+    @classmethod
+    def INPUT_TYPES(cls) -> InputTypes:
+        return {
+            "required": {
+                "start": ("FLOAT", {"default": 0.0, "step": 0.001}),
+                "end": ("FLOAT", {"default": 1.0, "step": 0.001}),
+                "fence_posts": ("INT", {"default": 2, "min": 0}),
+            }
+        }
+
+    CATEGORY = "generators"
+    OUTPUT_IS_LIST = (True,)
+    RETURN_TYPES = ("FLOAT",)
+    FUNCTION = "execute"
+
+    def execute(self, start: float, end: float, fence_posts: int) -> tuple[list[float]]:
+        if fence_posts == 0:
+            return [],
+        elif fence_posts == 1:
+            return [start],
+        elif fence_posts == 2:
+            return [start, end],
+
+        step = (end - start) / (fence_posts - 1)
+        return [start + i * step for i in range(fence_posts)],
+
+
+class FloatRange3(CustomNode):
+    @classmethod
+    def INPUT_TYPES(cls) -> InputTypes:
+        return {
+            "required": {
+                "start": ("FLOAT", {"default": 0.0, "step": 0.001}),
+                "end": ("FLOAT", {"default": 1.0, "step": 0.001}),
+                "spans": ("INT", {"default": 1, "min": 0}),
+            }
+        }
+
+    CATEGORY = "generators"
+    OUTPUT_IS_LIST = (True,)
+    RETURN_TYPES = ("FLOAT",)
+    FUNCTION = "execute"
+
+    def execute(self, start: float, end: float, spans: int) -> tuple[list[float]]:
+        if spans == 0:
+            return [],
+        elif spans == 1:
+            return [start],
+
+        span_width = (end - start) / spans
+        return [start + i * span_width for i in range(spans)],
+
+
+class StringSplit(CustomNode):
+    @classmethod
+    def INPUT_TYPES(cls) -> InputTypes:
+        return {
+            "required": {
+                "value": ("STRING", {}),
+                "delimiter": ("STRING", {"default": ","}),
+            }
+        }
+
+    CATEGORY = "generators"
+    OUTPUT_IS_LIST = (True,)
+    RETURN_TYPES = ("STRING",)
+    FUNCTION = "execute"
+
+    def execute(self, value: str = "", delimiter: str = ",") -> tuple[list[str]]:
+        return value.split(delimiter),
+
+
+export_custom_nodes()
diff --git a/comfy_extras/nodes/nodes_open_api.py b/comfy_extras/nodes/nodes_open_api.py
index 2c165dc66..ab3eb52fe 100644
--- a/comfy_extras/nodes/nodes_open_api.py
+++ b/comfy_extras/nodes/nodes_open_api.py
@@ -29,7 +29,9 @@ from natsort import natsorted
 from torch import Tensor
 
 from comfy.cmd import folder_paths
+from comfy.comfy_types import IO
 from comfy.digest import digest
+from comfy.node_helpers import export_custom_nodes
 from comfy.nodes.package_typing import CustomNode, InputTypes, FunctionReturnsUIVariables, SaveNodeResult, \
     InputTypeSpec, ValidatedNodeResult
 
@@ -301,6 +303,25 @@ class StringJoin(CustomNode):
         return (separator.join([kwargs[key] for key in sorted_keys if kwargs[key] != ""]),)
 
 
+class StringJoin1(CustomNode):
+    @classmethod
+    def INPUT_TYPES(cls) -> InputTypes:
+        optional = {f"value{i}": (IO.ANY, {}) for i in range(5)}
+        optional["separator"] = (IO.STRING, {"default": "_"})
+        return {
+            "required": {},
+            "optional": optional
+        }
+
+    RETURN_TYPES = ("STRING",)
+    CATEGORY = "api/openapi"
+    FUNCTION = "execute"
+
+    def execute(self, separator: str = "_", *args: str, **kwargs) -> ValidatedNodeResult:
+        sorted_keys = natsorted(kwargs.keys())
+        return (separator.join([str(kwargs[key]) for key in sorted_keys if kwargs[key] is not None]),)
+
+
 class StringToUri(CustomNode):
     @classmethod
     def INPUT_TYPES(cls) -> InputTypes:
@@ -711,25 +732,4 @@ class ImageRequestParameter(CustomNode):
         return (output_image,)
 
 
-NODE_CLASS_MAPPINGS = {}
-for cls in (
-        IntRequestParameter,
-        FloatRequestParameter,
-        StringRequestParameter,
-        StringEnumRequestParameter,
-        BooleanRequestParameter,
-        HashImage,
-        StringPosixPathJoin,
-        LegacyOutputURIs,
-        DevNullUris,
-        StringJoin,
-        StringToUri,
-        UriFormat,
-        ImageExif,
-        ImageExifMerge,
-        ImageExifUncommon,
-        ImageExifCreationDateAndBatchNumber,
-        SaveImagesResponse,
-        ImageRequestParameter
-):
-    NODE_CLASS_MAPPINGS[cls.__name__] = cls
+export_custom_nodes()
diff --git a/tests/unit/test_generators.py b/tests/unit/test_generators.py
new file mode 100644
index 000000000..d4a301492
--- /dev/null
+++ b/tests/unit/test_generators.py
@@ -0,0 +1,266 @@
+import pytest
+
+from comfy_extras.nodes.nodes_generators import IntRange, FloatRange1, FloatRange2, FloatRange3, StringSplit
+
+
+def test_int_range():
+    node = IntRange()
+
+    # Basic range
+    result = node.execute(0, 5, 1)
+    assert result == ([0, 1, 2, 3, 4],)
+
+    # Negative step
+    result = node.execute(5, 0, -1)
+    assert result == ([5, 4, 3, 2, 1],)
+
+    # Empty range (step in wrong direction)
+    result = node.execute(0, 5, -1)
+    assert result == ([],)
+
+    # Single item range
+    result = node.execute(0, 1, 1)
+    assert result == ([0],)
+
+    # Step size > 1
+    result = node.execute(0, 10, 2)
+    assert result == ([0, 2, 4, 6, 8],)
+
+
+def test_float_range1():
+    node = FloatRange1()
+
+    # Basic range
+    result = node.execute(0.0, 1.0, 0.25)
+    assert result == ([0.0, 0.25, 0.5, 0.75],)
+
+    # Step size of 1
+    result = node.execute(0.0, 3.0, 1.0)
+    assert result == ([0.0, 1.0, 2.0],)
+
+    # Zero step
+    result = node.execute(0.0, 1.0, 0.0)
+    assert result == ([],)
+
+    # Negative step
+    result = node.execute(1.0, 0.0, -0.25)
+    assert result == ([1.0, 0.75, 0.5, 0.25],)
+
+    # Test floating point precision
+    result = node.execute(0.0, 0.3, 0.1)
+    assert len(result[0]) == 3
+    assert all(abs(a - b) < 1e-10 for a, b in zip(result[0], [0.0, 0.1, 0.2]))
+
+
+def test_float_range2():
+    node = FloatRange2()
+
+    # Basic range with 5 points
+    result = node.execute(0.0, 1.0, 5)
+    assert result == ([0.0, 0.25, 0.5, 0.75, 1.0],)
+
+    # Zero points
+    result = node.execute(0.0, 1.0, 0)
+    assert result == ([],)
+
+    # One point
+    result = node.execute(0.0, 1.0, 1)
+    assert result == ([0.0],)
+
+    # Two points
+    result = node.execute(0.0, 1.0, 2)
+    assert result == ([0.0, 1.0],)
+
+    # Test negative range
+    result = node.execute(1.0, -1.0, 3)
+    assert result == ([1.0, 0.0, -1.0],)
+
+    # Test floating point precision
+    result = node.execute(0.0, 0.2, 3)
+    assert len(result[0]) == 3
+    assert all(abs(a - b) < 1e-10 for a, b in zip(result[0], [0.0, 0.1, 0.2]))
+
+
+def test_float_range3():
+    node = FloatRange3()
+
+    # Basic range with 4 spans
+    result = node.execute(0.0, 1.0, 4)
+    expected = [0.0, 0.25, 0.5, 0.75]  # Note: doesn't include end point
+    assert result == (expected,)
+
+    # Zero spans
+    result = node.execute(0.0, 1.0, 0)
+    assert result == ([],)
+
+    # One span
+    result = node.execute(0.0, 1.0, 1)
+    assert result == ([0.0],)
+
+    # Test negative range
+    result = node.execute(1.0, -1.0, 2)
+    assert result == ([1.0, 0.0],)
+
+    # Test floating point precision
+    result = node.execute(0.0, 0.3, 3)
+    assert len(result[0]) == 3
+    assert all(abs(a - b) < 1e-10 for a, b in zip(result[0], [0.0, 0.1, 0.2]))
+
+
+def test_output_types():
+    """Test that all nodes return correct types and list outputs"""
+    # IntRange
+    result = IntRange().execute(0, 5, 1)
+    assert isinstance(result, tuple)
+    assert len(result) == 1
+    assert isinstance(result[0], list)
+    assert all(isinstance(x, int) for x in result[0])
+
+    # FloatRange1
+    result = FloatRange1().execute(0.0, 1.0, 0.5)
+    assert isinstance(result, tuple)
+    assert len(result) == 1
+    assert isinstance(result[0], list)
+    assert all(isinstance(x, float) for x in result[0])
+
+    # FloatRange2
+    result = FloatRange2().execute(0.0, 1.0, 3)
+    assert isinstance(result, tuple)
+    assert len(result) == 1
+    assert isinstance(result[0], list)
+    assert all(isinstance(x, float) for x in result[0])
+
+    # FloatRange3
+    result = FloatRange3().execute(0.0, 1.0, 2)
+    assert isinstance(result, tuple)
+    assert len(result) == 1
+    assert isinstance(result[0], list)
+    assert all(isinstance(x, float) for x in result[0])
+
+
+@pytest.mark.parametrize("node_class", [IntRange, FloatRange1, FloatRange2, FloatRange3])
+def test_node_metadata(node_class):
+    """Test that all nodes have correct metadata"""
+    node = node_class()
+
+    # Check required class attributes
+    assert hasattr(node, 'CATEGORY')
+    assert hasattr(node, 'OUTPUT_IS_LIST')
+    assert hasattr(node, 'RETURN_TYPES')
+    assert hasattr(node, 'FUNCTION')
+
+    # Verify OUTPUT_IS_LIST matches number of outputs
+    assert len(node.OUTPUT_IS_LIST) == len(node.RETURN_TYPES)
+    assert node.OUTPUT_IS_LIST == (True,)
+
+    # Verify input types exist
+    input_types = node.INPUT_TYPES()
+    assert 'required' in input_types
+
+    # All nodes should have appropriate numeric types
+    if node_class == IntRange:
+        assert all(v[0] == 'INT' for v in input_types['required'].values())
+    else:
+        assert input_types['required']['start'][0] == 'FLOAT'
+        assert input_types['required']['end'][0] == 'FLOAT'
+
+
+def test_string_split_basic():
+    node = StringSplit()
+
+    # Basic comma split
+    result = node.execute("a,b,c")
+    assert result == (["a", "b", "c"],)
+
+    # Custom delimiter
+    result = node.execute("a|b|c", delimiter="|")
+    assert result == (["a", "b", "c"],)
+
+    # Empty string
+    result = node.execute("")
+    assert result == ([""],)
+
+    # Single value (no delimiters)
+    result = node.execute("abc")
+    assert result == (["abc"],)
+
+
+def test_string_split_edge_cases():
+    node = StringSplit()
+
+    # Multiple consecutive delimiters
+    result = node.execute("a,,b,,c")
+    assert result == (["a", "", "b", "", "c"],)
+
+    # Leading/trailing delimiters
+    result = node.execute(",a,b,c,")
+    assert result == (["", "a", "b", "c", ""],)
+
+    # Multi-character delimiter
+    result = node.execute("a<->b<->c", delimiter="<->")
+    assert result == (["a", "b", "c"],)
+
+    # Whitespace handling
+    result = node.execute("  a  ,  b  ,  c  ")
+    assert result == (["  a  ", "  b  ", "  c  "],)
+
+    # Split on whitespace
+    result = node.execute("a b c", delimiter=" ")
+    assert result == (["a", "b", "c"],)
+
+
+def test_string_split_special_chars():
+    node = StringSplit()
+
+    # Split on newline
+    result = node.execute("a\nb\nc", delimiter="\n")
+    assert result == (["a", "b", "c"],)
+
+    # Split on tab
+    result = node.execute("a\tb\tc", delimiter="\t")
+    assert result == (["a", "b", "c"],)
+
+    # Regex special characters as delimiters
+    result = node.execute("a.b.c", delimiter=".")
+    assert result == (["a", "b", "c"],)
+
+    # Unicode delimiters
+    result = node.execute("a→b→c", delimiter="→")
+    assert result == (["a", "b", "c"],)
+
+
+def test_string_split_metadata():
+    node = StringSplit()
+
+    # Check required class attributes
+    assert hasattr(node, 'CATEGORY')
+    assert hasattr(node, 'OUTPUT_IS_LIST')
+    assert hasattr(node, 'RETURN_TYPES')
+    assert hasattr(node, 'FUNCTION')
+
+    # Verify OUTPUT_IS_LIST matches RETURN_TYPES
+    assert len(node.OUTPUT_IS_LIST) == len(node.RETURN_TYPES)
+    assert node.OUTPUT_IS_LIST == (True,)
+    assert node.RETURN_TYPES == ("STRING",)
+
+    # Check input types
+    input_types = node.INPUT_TYPES()
+    assert 'required' in input_types
+    assert 'value' in input_types['required']
+    assert 'delimiter' in input_types['required']
+    assert input_types['required']['value'][0] == 'STRING'
+    assert input_types['required']['delimiter'][0] == 'STRING'
+
+    # Check delimiter default
+    assert input_types['required']['delimiter'][1]['default'] == ','
+
+
+def test_string_split_return_type():
+    node = StringSplit()
+
+    # Verify return structure
+    result = node.execute("a,b,c")
+    assert isinstance(result, tuple)
+    assert len(result) == 1
+    assert isinstance(result[0], list)
+    assert all(isinstance(x, str) for x in result[0])