Add links to other convert-to-nia implementations
diff --git a/example/convert-to-nia/convert-to-nia.c b/example/convert-to-nia/convert-to-nia.c
index 0572499..3b8b1ef 100644
--- a/example/convert-to-nia/convert-to-nia.c
+++ b/example/convert-to-nia/convert-to-nia.c
@@ -19,6 +19,12 @@
format) to stdout (in the NIA/NIE format).
See the "const char* g_usage" string below for details.
+
+An equivalent program (using the Chromium image codecs) is at:
+https://chromium-review.googlesource.com/c/chromium/src/+/2210331
+
+An equivalent program (using the Skia image codecs) is at:
+https://skia-review.googlesource.com/c/skia/+/290618
*/
#include <errno.h>
