diff --git a/.gitmodules b/.gitmodules
index fbd5ecc..adf1f13 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -14,3 +14,12 @@
 [submodule "Vendor/glm"]
 	path = Vendor/glm
 	url = https://github.com/g-truc/glm
+[submodule "Vendor/RmlUi"]
+	path = Vendor/RmlUi
+	url = https://github.com/mikke89/RmlUi
+[submodule "Vendor/box2d"]
+	path = Vendor/box2d
+	url = https://github.com/erincatto/box2d
+[submodule "Vendor/freetype"]
+	path = Vendor/freetype
+	url = https://github.com/freetype/freetype
diff --git a/Src/IAEngine/CMakeLists.txt b/Src/IAEngine/CMakeLists.txt
index eeb9b51..bf99e7e 100644
--- a/Src/IAEngine/CMakeLists.txt
+++ b/Src/IAEngine/CMakeLists.txt
@@ -40,4 +40,4 @@ target_include_directories(IAEngine PUBLIC inc/)
 target_include_directories(IAEngine PRIVATE imp/hpp)
 
 target_link_libraries(IAEngine PUBLIC IACore ImGui glm::glm)
-target_link_libraries(IAEngine PRIVATE SDL3::SDL3 SDL3_mixer::SDL3_mixer)
+target_link_libraries(IAEngine PRIVATE SDL3::SDL3 SDL3_mixer::SDL3_mixer box2d RmlUi::RmlUi)
diff --git a/Vendor/CMakeLists.txt b/Vendor/CMakeLists.txt
index 08c0d8d..4a84221 100644
--- a/Vendor/CMakeLists.txt
+++ b/Vendor/CMakeLists.txt
@@ -1,4 +1,4 @@
-# -----------------------------------------------
+#-----------------------------------------------
 #  SDL3
 # -----------------------------------------------
 set(SDL_TEST_LIBRARY OFF)
@@ -41,3 +41,20 @@ target_include_directories(
 #  GLM
 # -----------------------------------------------
 add_subdirectory(glm/)
+
+# -----------------------------------------------
+#  FreeType
+# -----------------------------------------------
+add_subdirectory(freetype/)
+
+add_library(Freetype::Freetype ALIAS freetype)
+
+# -----------------------------------------------
+#  RmlUI
+# -----------------------------------------------
+add_subdirectory(RmlUI/)
+
+# -----------------------------------------------
+#  Box2D
+# -----------------------------------------------
+add_subdirectory(box2d/)
diff --git a/Vendor/RmlUi b/Vendor/RmlUi
new file mode 160000
index 0000000..5556ac7
--- /dev/null
+++ b/Vendor/RmlUi
@@ -0,0 +1 @@
+Subproject commit 5556ac74c5e2e76ed09e1305a891fdd7fff7f7ef
diff --git a/Vendor/box2d b/Vendor/box2d
new file mode 160000
index 0000000..f86d182
--- /dev/null
+++ b/Vendor/box2d
@@ -0,0 +1 @@
+Subproject commit f86d1827eb7c060b4a32d311b84e3987c154e293
diff --git a/Vendor/freetype b/Vendor/freetype
new file mode 160000
index 0000000..41eab7e
--- /dev/null
+++ b/Vendor/freetype
@@ -0,0 +1 @@
+Subproject commit 41eab7e66dfc5c2a5ca8c09790e42a77b049ecd6