added a few tools

portable_computing_toolkit_installer/resources/supported_tools.json

@@ -428,5 +428,39 @@
             "filename regex": "",
             "text regex": ""
         }
+    },
+    {
+        "name": "Umbrello",
+        "page": "https://download.kde.org/stable/umbrello/latest/win64/",
+        "category": "development.tools",
+        "homepage": "https://umbrello.kde.org/",
+        "icon url": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Umbrello-icon.svg/128px-Umbrello-icon.svg.png",
+        "search": {
+            "selector": "",
+            "filename regex": "",
+            "text regex": ""
+        }
+    },
+    {
+        "name": "QOwnNotes",
+        "page": "https://portableapps.com/apps/office/qownnotes-portable",
+        "category": "office.notes",
+        "homepage": "https://www.qownnotes.org/",
+        "search": {
+            "selector": "",
+            "filename regex": "",
+            "text regex": ""
+        }
+    },
+    {
+        "name": "SageMath",
+        "page": "http://mirrors.mit.edu/sage/win/index.html",
+        "category": "education.mathmatics",
+        "homepage": "http://www.sagemath.org/",
+        "search": {
+            "selector": "",
+            "filename regex": "",
+            "text regex": ""
+        }
     }
 ]