diff --git a/source/_data/miscellaneous.json b/source/_data/miscellaneous.json
index 6987ce7..4bed59e 100644
--- a/source/_data/miscellaneous.json
+++ b/source/_data/miscellaneous.json
@@ -1441,6 +1441,42 @@
         "OStatusClass": false,
         "categories": ["Other"]
       },
+      {
+        "title": "Inventaire",
+        "source": "https://github.com/inventaire/inventaire",
+        "protocols": "ActivityPub",
+        "site": "https://inventaire.io/welcome",
+        "logo": "",
+        "servers": "",
+        "description": "A free open platform for cataloguing and sharing physical books from personal collections and independent libraries.",
+        "codeLanguage": "Javascript",
+        "techStack": "",
+        "license": "AGPL-3.0",
+        "FediAccount": "",
+        "apClass": true,
+        "zotClass": false,
+        "diasporaClass": false,
+        "OStatusClass": false,
+        "categories": ["Reviews"]
+      },
+      {
+        "title": "Mammoth",
+        "source": "https://gitlab.koehn.com/mammoth/mammoth-server",
+        "protocols": "ActivityPub",
+        "site": "",
+        "logo": "",
+        "servers": "",
+        "description": "Social media platform implementing ActivityPub for client/server and server/server communications.",
+        "codeLanguage": "TypeScript",
+        "techStack": "",
+        "license": "AGPL-3.0",
+        "FediAccount": "",
+        "apClass": true,
+        "zotClass": false,
+        "diasporaClass": false,
+        "OStatusClass": false,
+        "categories": ["SN-mi"]
+      },
       {
         "title": "diaspora*",
         "source": "https://github.com/diaspora/diaspora",