diff --git a/.gitmodules b/.gitmodules
index 3df086392..07265f40b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,6 +4,9 @@
 [submodule "external/googletest"]
 	url = https://github.com/google/googletest.git
 	path = external/googletest
+[submodule "external/glm"]
+	url = https://github.com/g-truc/glm.git
+	path = external/glm
 [submodule "external/glslang"]
 	url = https://github.com/KhronosGroup/glslang.git
 	path = external/glslang
@@ -28,3 +31,15 @@
 [submodule "external/cli11"]
 	url = https://github.com/CLIUtils/CLI11.git
 	path = external/cli11
+[submodule "external/google-benchmark"]
+    path = external/google-benchmark
+    url = https://github.com/google/benchmark.git
+[submodule "external/flatbuffers"]
+    path = external/flatbuffers
+    url = https://github.com/google/flatbuffers.git
+[submodule "external/lua"]
+    path = external/lua
+    url = https://github.com/bmwcarit/lua.git
+[submodule "external/sol"]
+    path = external/sol
+    url = https://github.com/ThePhD/sol2.git
diff --git a/external/flatbuffers b/external/flatbuffers
new file mode 160000
index 000000000..6df40a247
--- /dev/null
+++ b/external/flatbuffers
@@ -0,0 +1 @@
+Subproject commit 6df40a2471737b27271bdd9b900ab5f3aec746c7
diff --git a/external/glm b/external/glm
new file mode 160000
index 000000000..13724cfae
--- /dev/null
+++ b/external/glm
@@ -0,0 +1 @@
+Subproject commit 13724cfae64a8b5313d1cabc9a963d2c9dbeda12
diff --git a/external/google-benchmark b/external/google-benchmark
new file mode 160000
index 000000000..73d4d5e8d
--- /dev/null
+++ b/external/google-benchmark
@@ -0,0 +1 @@
+Subproject commit 73d4d5e8d6d449fc8663765a42aa8aeeee844489
diff --git a/external/lua b/external/lua
new file mode 160000
index 000000000..9c3ea1aad
--- /dev/null
+++ b/external/lua
@@ -0,0 +1 @@
+Subproject commit 9c3ea1aade414143fa77933103373b32ef78f5f0
diff --git a/external/sol b/external/sol
new file mode 160000
index 000000000..288f4f4e7
--- /dev/null
+++ b/external/sol
@@ -0,0 +1 @@
+Subproject commit 288f4f4e73f379cca56f8eb7840a449adac0acb9