diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..948fd00
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,10 @@
+[submodule "spdlog"]
+	path = modules/spdlog
+	url = https://github.com/gabime/spdlog.git
+[submodule "portable-file-dialogs"]
+	path = modules/portable-file-dialogs
+	url = https://github.com/samhocevar/portable-file-dialogs.git
+[submodule "imgui"]
+	path = modules/imgui
+	url = https://github.com/ocornut/imgui.git
+        branch = docking
diff --git a/modules/imgui b/modules/imgui
new file mode 160000
index 0000000..2d403a1
--- /dev/null
+++ b/modules/imgui
@@ -0,0 +1 @@
+Subproject commit 2d403a16144070a4cb46bb124318b20141e83cb4
diff --git a/modules/portable-file-dialogs b/modules/portable-file-dialogs
new file mode 160000
index 0000000..7f852d8
--- /dev/null
+++ b/modules/portable-file-dialogs
@@ -0,0 +1 @@
+Subproject commit 7f852d88a480020d7f91957cbcefe514fc95000c
diff --git a/modules/spdlog b/modules/spdlog
new file mode 160000
index 0000000..3335c38
--- /dev/null
+++ b/modules/spdlog
@@ -0,0 +1 @@
+Subproject commit 3335c380a08c5e0f5117a66622df6afdb3d74959