diff --git a/README.md b/README.md
index 25ea5b2..0021a7a 100644
--- a/README.md
+++ b/README.md
@@ -71,3 +71,4 @@ This should be updated fairly regularly. As usual, **pull requests are encourage
 * [Sphinx](http://sphinx.pocoo.org/) - Comprehensive documentation tool using restructuredText with beautiful HTML and PDF output. (contributed by [@nikhilcutshort](https://twitter.com/nikhilcutshort))
 * [dr.js](https://github.com/DmitryBaranovskiy/dr.js) - Tiny JavaScript documentation generator from the author of RaphaëlJS.  (contributed by [@nikhilcutshort](https://twitter.com/nikhilcutshort))
 * [Markdoc](http://markdoc.org/) - Lightweight documentation/wiki generator in Python, released in the [public domain](http://unlicense.org/). (contributed by [Neelfyn](http://neelfyn.info/))
+* [ApiGen](http://apigen.org/) - Creates clean API documentation from PHP source code (contributed by [bryceadams](http://bryce.se/))
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