diff --git a/.gitmodules b/.gitmodules
index 470ec25..50d9678 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -25,3 +25,6 @@
 [submodule "wayland-book"]
 	path = wayland-book
 	url = https://git.sr.ht/~sircmpwn/wayland-book
+[submodule "source-library"]
+	path = source-library
+	url = https://github.com/NB419/source-library
diff --git a/index.md b/index.md
index c415a5b..828a865 100644
--- a/index.md
+++ b/index.md
@@ -27,3 +27,5 @@
 [SSHy](SSHy)
 
 [keeweb](keeweb)
+
+[source library](source-library)
diff --git a/source-library b/source-library
new file mode 160000
index 0000000..3274f20
--- /dev/null
+++ b/source-library
@@ -0,0 +1 @@
+Subproject commit 3274f206ab00066b05d1e4eb4c722475b9c8679c