diff --git a/README.md b/README.md
index 6e33abe..85c0cf1 100644
--- a/README.md
+++ b/README.md
@@ -96,6 +96,8 @@ A curated list of awesome malware analysis tools and resources. Inspired by
   malware analysis tool.
 * [jsunpack-n](https://code.google.com/p/jsunpack-n/) - A javascript
   unpacker that emulates browser functionality.
+* [PDF Tools](http://blog.didierstevens.com/programs/pdf-tools/) - pdfid,
+  pdf-parser, and more from Didier Stevens.
 * [Spidermonkey](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey) -
   Mozilla's JavaScript engine, for debugging malicious JS.
 * [diStorm](http://www.ragestorm.net/distorm/) - Disassembler for analyzing