diff --git a/.vscode/settings.json b/.vscode/settings.json
index daab807..e242ab7 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -63,6 +63,7 @@
         "hadolint",
         "hdparm",
         "helmfile",
+        "hoppscotch",
         "imager",
         "istio",
         "istioctl",
diff --git a/knowledge base/hoppscotch.placeholder b/knowledge base/hoppscotch.placeholder
new file mode 100644
index 0000000..0f323d6
--- /dev/null
+++ b/knowledge base/hoppscotch.placeholder	
@@ -0,0 +1,17 @@
+```sh
+brew install --cask 'hoppscotch'
+```
+
+Access the variables in the request section by referencing the variable in the format `<<variable_name>>`.
+
+post-request scripts == tests
+
+Set environment variables to use with a next request:
+
+```js
+const jsonData = pw.response.body;                // Save the JSON payload response
+pw.env.set("accessToken", jsonData.access_token); // Set "accessToken" to the value of "access_token" in the response
+pw.env.set("idToken", jsonData.id_token);         // Set "idToken" to the value of "id_token" in the response
+```
+
+https://docs.hoppscotch.io/
diff --git a/knowledge base/insomnia.md b/knowledge base/insomnia.md
index fd5e619..af710a0 100644
--- a/knowledge base/insomnia.md	
+++ b/knowledge base/insomnia.md	
@@ -24,6 +24,8 @@
 - [Documentation]
 - [Inso CLI], runner for Insomnia
 - [Postman], an alternative to Insomnia
+- [Hoppscotch], an alternative to Insomnia
+- [Bruno], an alternative to Insomnia
 
 ## Sources
 
@@ -44,6 +46,8 @@ All the references in the [further readings] section, plus the following:
 [further readings]: #further-readings
 
 <!-- Knowledge base -->
+[bruno]: bruno.md
+[hoppscotch]: hoppscotch.md
 [postman]: postman.md
 
 <!-- Others -->
diff --git a/knowledge base/javascript.placeholder b/knowledge base/javascript.placeholder
new file mode 100644
index 0000000..f91e4a4
--- /dev/null
+++ b/knowledge base/javascript.placeholder	
@@ -0,0 +1,11 @@
+```js
+let now = new Date()
+
+let oneYearFromNow = new Date()
+oneYearFromNow.setDate(oneYearFromNow.getDate() + 365)
+
+console.log(now.toISOString())
+console.log(oneYearFromNow.toISOString())
+```
+
+https://playcode.io/empty_javascript
diff --git a/knowledge base/postman.md b/knowledge base/postman.md
index ac3a056..060ee40 100644
--- a/knowledge base/postman.md	
+++ b/knowledge base/postman.md	
@@ -66,8 +66,10 @@ More examples [here][scripting in postman].
 
 - [Website]
 - [Documentation]
-- [Insomnia], an alternative to Postman
 - [Newman], CLI Collection runner for Postman
+- [Insomnia], an alternative to Postman
+- [Hoppscotch], an alternative to Postman
+- [Bruno], an alternative to Postman
 
 ## Sources
 
@@ -87,5 +89,7 @@ All the references in the [further readings] section, plus the following:
 [website]: https://www.postman.com/
 
 <!-- Knowledge base -->
+[bruno]: bruno.md
+[hoppscotch]: hoppscotch.md
 [insomnia]: insomnia.md
 [newman]: newman.md