Add pointers to tadpole's LICENSE file.
diff --git a/LICENSE b/LICENSE
index 1c1b947..6c7df4f 100644
--- a/LICENSE
+++ b/LICENSE
@@ -202,3 +202,15 @@
This product bundles queue.h 8.5, which is available under the "3-clause BSD"
license. For details, see libs/os/include/os/queue.h.
+
+This product partly derives from FreeBSD, which is available under the
+"3-clause BSD" license. For details, see:
+ * libs/os/src/os_mbuf.c
+ * libs/util/src/base64.c
+
+This product bundles parts of CMSIS-CORE, which is available under the
+"3-clause BSD" license. Bundled files are:
+ * libs/os/src/arch/cortex_m0/m0/HAL_CM0.s
+ * libs/os/src/arch/cortex_m0/m0/SVC_Table.s
+ * libs/os/src/arch/cortex_m4/m4/HAL_CM4.s
+ * libs/os/src/arch/cortex_m4/m4/SVC_Table.s
