diff --git a/by-topic.md b/by-topic.md
index feb972b..fe3dcc6 100644
--- a/by-topic.md
+++ b/by-topic.md
@@ -161,6 +161,7 @@
 - [nosql](#nosql)
 - [npm](#npm)
 - [objective-c](#objective-c)
+- [obsidian](#obsidian)
 - [obsidian-md](#obsidian-md)
 - [obsidian-plugin](#obsidian-plugin)
 - [open-data](#open-data)
@@ -2646,6 +2647,12 @@
 
 - [ChatSecure/ChatSecure-iOS](https://github.com/ChatSecure/ChatSecure-iOS) - ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.
 
+## obsidian 
+
+- [siyuan-note/siyuan](https://github.com/siyuan-note/siyuan) - A privacy-first, self-hosted, fully open source personal knowledge management software, written in typescript and golang.
+- [Vinzent03/obsidian-git](https://github.com/Vinzent03/obsidian-git) - Integrate Git version control with automatic commit-and-sync and other advanced features in Obsidian.md
+- [LBF38/obsidian-syncthing-integration](https://github.com/LBF38/obsidian-syncthing-integration) - Obsidian plugin for Syncthing integration
+
 ## obsidian-md 
 
 - [Vinzent03/obsidian-git](https://github.com/Vinzent03/obsidian-git) - Integrate Git version control with automatic commit-and-sync and other advanced features in Obsidian.md