diff --git a/readme.md b/readme.md
index ad63dc2..871bdb7 100644
--- a/readme.md
+++ b/readme.md
@@ -91,6 +91,7 @@ Inspired by the [awesome](https://github.com/sindresorhus/awesome) list thing.
 - [debug](https://github.com/visionmedia/debug) - Tiny debugging utility.
 - [jstrace](https://github.com/jstrace/jstrace) - Dynamic tracing for JavaScript, similar to dtrace, ktap etc.
 - [TraceGL](https://github.com/traceglMPL/tracegl) - Transforms your JavaScript, injecting monitoring code that produces a log of everything that happens.
+- [Spy-js](https://github.com/spy-js/spy-js#installation) - Tracing tool for JavaScript, featuring configurable event capturing, searchable call stack, code coverage, recorded object values inspection, multi process and node cluster tracing support. 
 
 
 ### Logging