diff --git a/README.md b/README.md
index 0c91126..4a22b47 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,13 @@
 Inspired by the [official PHP SDK](https://github.com/invoiceninja/sdk-php), a
 Python wrapper for Invoice Ninja's REST API.
 
+# Models
+
+Projects to look to for guidance:
+
+* [official PHP SDK](https://github.com/invoiceninja/sdk-php)
+    - official Invoice Ninja SDK
+
+* [python-vaultwarden](https://github.com/numberly/python-vaultwarden)
+    - simple python wrapper for the bitwarden/vaultwarden
+