diff --git a/docs/en/case.md b/docs/en/case.md
index 1757ae57..1497922c 100644
--- a/docs/en/case.md
+++ b/docs/en/case.md
@@ -72,4 +72,6 @@
 
 * [gui for m5stack by micropython](https://github.com/lifedebug/m5stack) - gui for m5stack by micropython
 
-* [M5Stack-Tetris-using-RCWController](https://github.com/PartsandCircuits/M5Stack-Tetris-using-RCWController) - Play Tetris on an M5Stack using the RCWController iPhone app to control the action.
\ No newline at end of file
+* [M5Stack-Tetris-using-RCWController](https://github.com/PartsandCircuits/M5Stack-Tetris-using-RCWController) - Play Tetris on an M5Stack using the RCWController iPhone app to control the action.
+
+* [AcornsM5](https://github.com/EternityForest/AcornsM5) - Squirrel based OS for the M5Stack, can run apps from SD card.
\ No newline at end of file
diff --git a/docs/ja/case.md b/docs/ja/case.md
index 14bc9c84..16410ec2 100644
--- a/docs/ja/case.md
+++ b/docs/ja/case.md
@@ -98,4 +98,8 @@
 - [m5stack-onscreen-keyboard](https://github.com/yellowelise/m5stack-onscreen-keyboard)
   - スクリーンQWERTYキーボードアプリ
 
-<!-- * [gui for m5stack by micropython](https://github.com/lifedebug/m5stack) - gui for m5stack by micropython -->
+* [gui for m5stack by micropython](https://github.com/lifedebug/m5stack) - gui for m5stack by micropython
+
+* [M5Stack-Tetris-using-RCWController](https://github.com/PartsandCircuits/M5Stack-Tetris-using-RCWController) - Play Tetris on an M5Stack using the RCWController iPhone app to control the action.
+
+* [AcornsM5](https://github.com/EternityForest/AcornsM5) - Squirrel based OS for the M5Stack, can run apps from SD card.
diff --git a/docs/zh_CN/case.md b/docs/zh_CN/case.md
index edd23550..034c4b00 100644
--- a/docs/zh_CN/case.md
+++ b/docs/zh_CN/case.md
@@ -70,4 +70,6 @@
 
 * [gui for m5stack by micropython](https://github.com/lifedebug/m5stack) - gui for m5stack by micropython
 
-* [M5Stack-Tetris-using-RCWController](https://github.com/PartsandCircuits/M5Stack-Tetris-using-RCWController) - Play Tetris on an M5Stack using the RCWController iPhone app to control the action.
\ No newline at end of file
+* [M5Stack-Tetris-using-RCWController](https://github.com/PartsandCircuits/M5Stack-Tetris-using-RCWController) - Play Tetris on an M5Stack using the RCWController iPhone app to control the action.
+
+* [AcornsM5](https://github.com/EternityForest/AcornsM5) - Squirrel based OS for the M5Stack, can run apps from SD card.
\ No newline at end of file