diff --git a/sandbox/index.mdwn b/sandbox/index.mdwn
index 9885770c8..e82f822af 100644
--- a/sandbox/index.mdwn
+++ b/sandbox/index.mdwn
@@ -22,6 +22,10 @@ Related keywords:
 
 ---
 
+- [[OpenZIM - openZIM|https://wiki.openzim.org/wiki/OpenZIM]]
+
+---
+
 - <http://zeitgeist-project.com/>
 - <http://standardanalytics.io/>
 - <https://github.com/sballesteros/dcat>