diff --git a/README.md b/README.md
index ec8b689..d083a1d 100644
--- a/README.md
+++ b/README.md
@@ -32,3 +32,13 @@ Toolchains:
 | `mtime`     | Machine Timer Register     | Machine (via memory-mapped) | Used for timing and scheduling (not a CSR, but a memory-mapped register). |
 | `mip`       | Machine Interrupt Pending  | Machine           | Indicates pending interrupts.                                               |
 | `mie`       | Machine Interrupt Enable   | Machine           | Controls which interrupts are enabled.                                      |
+
+# Notes
+
+## Libc Implementations
+
+[uClibc](https://uclibc.org/)
+[musl libc](https://musl.libc.org/)
+[dietlibc](http://www.fefe.de/dietlibc/)
+
+[Comparison of C/POSIX standard library implementations for Linux](https://www.etalabs.net/compare_libcs.html) (by musl author)