diff --git a/pages/tools.obsidian.md b/pages/tools.obsidian.md
index d84bfc7..95d8150 100644
--- a/pages/tools.obsidian.md
+++ b/pages/tools.obsidian.md
@@ -167,6 +167,7 @@ _Obsidian is open source, but stil commercial project. Here is list of open sour
 - [joplin](https://github.com/rccavalcanti/joplin)
 - [zettlr](https://zettlr.com/)
 - [bangle](https://github.com/bangle-io/bangle-io)
+- [tangentnotes](http://tangentnotes.com/)
 
 ## Obsidian issues
 - [Nested vaults](https://forum.obsidian.md/t/nested-vaults-usage-and-risks/6360)
\ No newline at end of file