diff --git a/federated-ecosystems.md b/federated-ecosystems.md
index 1621dec57..ed3fdb569 100644
--- a/federated-ecosystems.md
+++ b/federated-ecosystems.md
@@ -2,6 +2,7 @@
 
 - [[pull]] [[federation]]
 - [[pull]] [[fediverse]]
+- Systems participating in [[open source]], [[open protocols]], [[open ethics]].
 
 
 [//begin]: # "Autogenerated link references for markdown compatibility"