diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..83f99acdb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,9 @@
+[submodule "External/narwhal"]
+	path = External/narwhal
+	url = git://github.com/tlrobinson/narwhal.git
+[submodule "External/browser.js"]
+	path = External/browser.js
+	url = git://github.com/tlrobinson/browser.js.git
+[submodule "External/ojunit"]
+	path = External/ojunit
+	url = git://github.com/280north/ojunit.git
diff --git a/External/browser.js b/External/browser.js
new file mode 160000
index 000000000..5edca7a4f
--- /dev/null
+++ b/External/browser.js
@@ -0,0 +1 @@
+Subproject commit 5edca7a4f764087d943e24117d0abbb18327116c
diff --git a/External/narwhal b/External/narwhal
new file mode 160000
index 000000000..24a61f570
--- /dev/null
+++ b/External/narwhal
@@ -0,0 +1 @@
+Subproject commit 24a61f570fefb3144bbd2f78f4756e64eb66952f
diff --git a/External/ojunit b/External/ojunit
new file mode 160000
index 000000000..d7ced3ec1
--- /dev/null
+++ b/External/ojunit
@@ -0,0 +1 @@
+Subproject commit d7ced3ec14b3ef4b8a214d63c794ace68b0ba4f0