diff --git a/utils/.gitattributes b/utils/.gitattributes
new file mode 100644
index 00000000..0653a6d1
--- /dev/null
+++ b/utils/.gitattributes
@@ -0,0 +1,3 @@
+*.pdb filter=lfs diff=lfs merge=lfs -text
+*.pdbqt filter=lfs diff=lfs merge=lfs -text
+*.mol2 filter=lfs diff=lfs merge=lfs -text
diff --git a/utils/pre-process/minimize/obmin-tool/.bumpversion.cfg b/utils/pre-process/minimize/obmin-tool/.bumpversion.cfg
new file mode 100644
index 00000000..238ee83c
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/.bumpversion.cfg
@@ -0,0 +1,29 @@
+[bumpversion]
+current_version = 0.1.0
+commit = False
+tag = False
+parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<release>[a-z]+)(?P<dev>\d+))?
+serialize = 
+	{major}.{minor}.{patch}-{release}{dev}
+	{major}.{minor}.{patch}
+
+[bumpversion:part:release]
+optional_value = _
+first_value = dev
+values = 
+	dev
+	_
+
+[bumpversion:part:dev]
+
+[bumpversion:file:pyproject.toml]
+search = version = "{current_version}"
+replace = version = "{new_version}"
+
+[bumpversion:file:VERSION]
+
+[bumpversion:file:README.md]
+
+[bumpversion:file:plugin.json]
+
+[bumpversion:file:src/polus/mm/utils/obmin/__init__.py]
diff --git a/utils/pre-process/minimize/obmin-tool/.dockerignore b/utils/pre-process/minimize/obmin-tool/.dockerignore
new file mode 100644
index 00000000..7c603f81
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/.dockerignore
@@ -0,0 +1,4 @@
+.venv
+out
+tests
+__pycache__
diff --git a/utils/pre-process/minimize/obmin-tool/.gitignore b/utils/pre-process/minimize/obmin-tool/.gitignore
new file mode 100644
index 00000000..c04bc49f
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/.gitignore
@@ -0,0 +1 @@
+poetry.lock
diff --git a/utils/pre-process/minimize/obmin-tool/CHANGELOG.md b/utils/pre-process/minimize/obmin-tool/CHANGELOG.md
new file mode 100644
index 00000000..b67793f7
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/CHANGELOG.md
@@ -0,0 +1,5 @@
+# CHANGELOG
+
+## 0.1.0
+
+Initial release.
diff --git a/utils/pre-process/minimize/obmin-tool/Dockerfile b/utils/pre-process/minimize/obmin-tool/Dockerfile
new file mode 100644
index 00000000..4a6d88f6
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/Dockerfile
@@ -0,0 +1,4 @@
+# docker build -f Dockerfile -t polusai/openbabel-tool .
+FROM condaforge/mambaforge
+# NOT mambaforge-pypy3 (openbabel is incompatible with pypy)
+RUN mamba install -c conda-forge openbabel
diff --git a/utils/pre-process/minimize/obmin-tool/README.md b/utils/pre-process/minimize/obmin-tool/README.md
new file mode 100644
index 00000000..f5852e41
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/README.md
@@ -0,0 +1,14 @@
+# obmin (0.1.0)
+
+Minimize a molecule using Open Babel
+
+## Options
+
+This plugin takes 3 input arguments and 1 output argument:
+
+| Name          | Description             | I/O    | Type   | Default |
+|---------------|-------------------------|--------|--------|---------|
+| script | Minimize script | Input | string | string |
+| input_mol2_path | Input mol2 file | Input | File | File |
+| output_mol2_path | Output mol2 filename | Input | string | string |
+| output_mol2_path | Output mol2 file | Output | File | File |
diff --git a/utils/pre-process/minimize/obmin-tool/VERSION b/utils/pre-process/minimize/obmin-tool/VERSION
new file mode 100644
index 00000000..6e8bf73a
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/VERSION
@@ -0,0 +1 @@
+0.1.0
diff --git a/utils/pre-process/minimize/obmin-tool/ict.yml b/utils/pre-process/minimize/obmin-tool/ict.yml
new file mode 100644
index 00000000..e5955deb
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/ict.yml
@@ -0,0 +1,51 @@
+specVersion: "0.1.0"
+name: obmin
+version: 0.1.0
+container: obmin-tool
+entrypoint:
+title: obmin
+description: Minimize a molecule using OpenBabel
+author: Brandon Walker, OpenBabel
+contact: brandon.walker@axleinfo.com
+repository:
+documentation:
+citation:
+
+inputs:
+  - name: script
+    required: true
+    description:
+    type: string
+  - name: input_mol2_path
+    required: true
+    description:
+    type: File
+    format:
+      uri: edam:format_3816
+  - name: output_mol2_path
+    required: true
+    description:
+    type: string
+    defaultValue: system.mol2
+    format:
+      uri: edam:format_3816
+outputs:
+  - name: output_mol2_path
+    required: true
+    description:
+    type: File
+    format:
+      uri: edam:format_3816
+ui:
+  - key: inputs.script
+    title: "script: "
+    description: ""
+    type: string
+  - key: inputs.input_mol2_path
+    title: "input_mol2_path: "
+    description: ""
+    type: File
+  - key: inputs.output_mol2_path
+    title: "output_mol2_path: "
+    description: ""
+    type: string
diff --git a/utils/pre-process/minimize/obmin-tool/obmin_0@1@0.cwl b/utils/pre-process/minimize/obmin-tool/obmin_0@1@0.cwl
new file mode 100644
index 00000000..017ebd77
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/obmin_0@1@0.cwl
@@ -0,0 +1,50 @@
+#!/usr/bin/env cwl-runner
+cwlVersion: v1.0
+
+class: CommandLineTool
+
+label: Run a Bash script
+
+doc: |
+  Run a Bash script
+
+baseCommand: bash
+
+hints:
+  DockerRequirement:
+    dockerPull: polusai/openbabel-tool@sha256:e685b764da702f37da5688766f976fc4b989054e090830e9c95c2510fe3112c6
+
+inputs:
+  script:
+    type: string
+    inputBinding:
+      position: 1
+
+  input_mol2_path:
+    type: File
+    format: edam:format_3816
+    inputBinding:
+      position: 2
+
+  output_mol2_path:
+    type: string
+    format: edam:format_3816
+#    inputBinding:
+#      position: 3
+    default: system.mol2
+
+outputs:
+  output_mol2_path:
+    type: File
+    format: edam:format_3816 # 'Textual format'
+    streamable: true
+    outputBinding:
+      glob: $(inputs.output_mol2_path)
+
+stdout: $(inputs.output_mol2_path)
+
+$namespaces:
+  edam: https://edamontology.org/
+
+$schemas:
+- https://raw.githubusercontent.com/edamontology/edamontology/master/EDAM_dev.owl
diff --git a/utils/pre-process/minimize/obmin-tool/obminimize.sh b/utils/pre-process/minimize/obmin-tool/obminimize.sh
new file mode 100644
index 00000000..8bc1209a
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/obminimize.sh
@@ -0,0 +1,6 @@
+#!/bin/bash -e
+# -cg is the default minimization algorithm, but it falsely claims to reach
+# convergence on the second timestep. (same with -newton)
+# Use steepest descent because it's the only one that works!
+obminimize -sd -o mol2 "$1" > temp.mol2 # -xu is ignored here
+obabel temp.mol2 -o mol2 -O "$2" -xu
diff --git a/utils/pre-process/minimize/obmin-tool/pyproject.toml b/utils/pre-process/minimize/obmin-tool/pyproject.toml
new file mode 100644
index 00000000..799e57b7
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/pyproject.toml
@@ -0,0 +1,28 @@
+[tool.poetry]
+name = "polus-mm-utils-obmin"
+version = "0.1.0"
+description = "Run a Bash script"
+authors = ["Data Scientist <data.scientist@labshare.org>"]
+readme = "README.md"
+
+[tool.poetry.dependencies]
+python = ">=3.9,<3.12"
+sophios = "0.1.1"
+
+[tool.poetry.group.dev.dependencies]
+bump2version = "^1.0.1"
+pytest = "^7.4"
+pytest-sugar = "^0.9.6"
+pre-commit = "^3.2.1"
+black = "^23.3.0"
+mypy = "^1.1.1"
+ruff = "^0.0.270"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.pytest.ini_options]
+pythonpath = [
+  "."
+]
diff --git a/utils/pre-process/minimize/obmin-tool/tests/__init__.py b/utils/pre-process/minimize/obmin-tool/tests/__init__.py
new file mode 100644
index 00000000..517ec5ee
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/tests/__init__.py
@@ -0,0 +1 @@
+"""Tests for obmin."""
diff --git a/utils/pre-process/minimize/obmin-tool/tests/benzene.mol2 b/utils/pre-process/minimize/obmin-tool/tests/benzene.mol2
new file mode 100644
index 00000000..dc5f18ae
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/tests/benzene.mol2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:52fbd7a9840ed9778ac3037fe6b0d22b53b3200cbf27bd59dba0f273e595edc5
+size 1625
diff --git a/utils/pre-process/minimize/obmin-tool/tests/test_obmin.py b/utils/pre-process/minimize/obmin-tool/tests/test_obmin.py
new file mode 100644
index 00000000..e8fd959a
--- /dev/null
+++ b/utils/pre-process/minimize/obmin-tool/tests/test_obmin.py
@@ -0,0 +1,32 @@
+"""Tests for obmin."""
+from pathlib import Path
+
+from sophios.api.pythonapi import Step
+from sophios.api.pythonapi import Workflow
+
+
+def test_obmin() -> None:
+    """Test obmin."""
+    cwl_file = Path("obmin_0@1@0.cwl")
+
+    # Create the step for the CWL file
+    obmin_step = Step(clt_path=cwl_file)
+
+    # Set up the inputs for the step
+    obmin_step.script = "/obminimize.sh"
+    obmin_step.input_mol2_path = str(Path(__file__).resolve().parent / "benzene.mol2")
+    obmin_step.output_mol2_path = "system.mol2"
+
+    # Define the workflow with the step
+    steps = [obmin_step]
+    filename = "obmin_workflow"
+    workflow = Workflow(steps, filename)
+
+    # Run the workflow
+    workflow.run()
+
+    # Check for the existence of the output file
+    outdir = Path("outdir")
+    assert any(
+        file.name == "system.mol2" for file in outdir.rglob("*")
+    ), "The file system.mol2 was not found."