diff --git a/amazons.marketplaces@gmail.com b/amazons.marketplaces@gmail.com
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--- /dev/null
+++ b/amazons.marketplaces@gmail.com
@@ -0,0 +1,21 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.1.x   | :white_check_mark: |
+| 5.0.x   | :x:                |
+| 4.0.x   | :white_check_mark: |
+| < 4.0   | :x:                |
+
+## Reporting a Vulnerability
+
+Use this section to tell people how to report a vulnerability.
+
+Tell them where to go, how often they can expect to get an update on a
+reported vulnerability, what to expect if the vulnerability is accepted or
+declined, etc.
diff --git a/topics/hackathon-kit/index.md b/topics/hackathon-kit/index.md
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index 00000000000..c49eb89978b
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+++ b/topics/hackathon-kit/index.md
@@ -0,0 +1,9 @@
+topic: hackathon-kit
+aliases: hack kit, resources, resource
+display_name: Hackathon Kit
+related: game-jam, hacktoberfest, game-off, hackathon-kit, hackathon-organiser, hackathon, hackathons
+short_description: A kit or resource for hackathons.
+wikipedia_url: https://en.wikipedia.org/wiki/Hackathon
+---
+
+A resources kit for hackathon organisers to draw on when organising their hackathons.
diff --git a/topics/hackathon-organiser/index.md b/topics/hackathon-organiser/index.md
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index 00000000000..e99c3d98466
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+++ b/topics/hackathon-organiser/index.md
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+topic: hackathon-organiser
+aliases: event-organiser, hack-organiser, hackathon-organizer, hack-organizer, event-organizer
+display_name: Hackathon Organiser
+related: game-jam, hacktoberfest, game-off, hackathon-kit, hackathon-organiser, hackathon, hackathons
+short_description: A person who organises or runs hackathons.
+wikipedia_url: https://en.wikipedia.org/wiki/Hackathon
+---
+
+A person who organises or runs hackathons. This person is usually looking for resources or sponsorship to help them organise their hack.
diff --git a/topics/hackathon/index.md b/topics/hackathon/index.md
index 650825d60b0..8ee631525f1 100644
--- a/topics/hackathon/index.md
+++ b/topics/hackathon/index.md
@@ -2,7 +2,8 @@
 topic: hackathon
 aliases: hackfest, codefest, hackday
 display_name: Hackathon
-related: game-jam, hacktoberfest, game-off
+aliases: hackathons, hackathon
+related: game-jam, hacktoberfest, game-off, hackathon-kit, hackathon-organiser
 short_description: A hackathon is a gathering where developers collaboratively code in an extreme manner over a short period of time.
 wikipedia_url: https://en.wikipedia.org/wiki/Hackathon
 ---
diff --git a/topics/obsidian-md/index.md b/topics/obsidian-md/index.md
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+++ b/topics/obsidian-md/index.md
@@ -0,0 +1,12 @@
+---
+topic: obsidian-md
+display_name: Obsidian
+aliases: obsidian
+url: https://obsidian.md
+github_url: https://github.com/obsidianmd
+short_description: Obsidian is a note taking app that edits locally stored Markdown files
+logo: obsidian.png
+created_by: Shida Li and Erica Xu
+released: May 2020
+---
+Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
diff --git a/topics/obsidian-md/obsidian.png b/topics/obsidian-md/obsidian.png
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index 00000000000..15ac8998a2f
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