diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1 +1,8 @@
-# See [`greenlock-store-test`](https://git.rootprojects.org/root/greenlock-store-test.js)
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+# See [`greenlock-store-test`](https://git.rootprojects.org/root/greenlock-store-test.js)
+
+That's the test.
+
+## Reference implementations
+
+* [`greenlock-store-fs`](https://git.rootprojects.org/root/greenlock-store-fs.js)
+* [`greenlock-store-sequelize`](https://git.rootprojects.org/root/greenlock-store-sequelize.js)
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