diff --git a/tools/Redboard.txt b/tools/Redboard.txt
new file mode 100644
index 0000000..99af983
--- /dev/null
+++ b/tools/Redboard.txt
@@ -0,0 +1,4 @@
+Files in this directory are copied from CrazyRedBoard's RedBoard project.
+As Chu Pico runs RedBoard's protocol, so it's here for your convenience.
+
+https://github.com/CrazyRedMachine/RedBoard
diff --git a/tools/chuniio.dll b/tools/chuniio.dll
new file mode 100644
index 0000000..2b72b9c
Binary files /dev/null and b/tools/chuniio.dll differ
diff --git a/tools/chunitest.exe b/tools/chunitest.exe
new file mode 100644
index 0000000..b1fa188
Binary files /dev/null and b/tools/chunitest.exe differ
diff --git a/tools/redboard.dll b/tools/redboard.dll
new file mode 100644
index 0000000..0671326
Binary files /dev/null and b/tools/redboard.dll differ