diff --git a/README.md b/README.md
index 85dc352..ae66490 100644
--- a/README.md
+++ b/README.md
@@ -64,9 +64,9 @@ This should be updated fairly regularly. As usual, **pull requests are encourage
 * [Pretty RFC](http://pretty-rfc.herokuapp.com/) - Reworked [IETF](http://www.ietf.org) documents for easier viewing.
 * [Vagrant](http://docs.vagrantup.com/) - Well organized, easy to read, attractive design. ([@clstokes](https://twitter.com/clstokes))
 * [Wolfram Language](http://reference.wolfram.com/language/) - Nice top-level navigation in a grid layout. Topics grouped by color, each with a relevant graphic and on-click menu of sub-topics. (contributed by [troytop](http://github.com/troyhop))
-* [Lisp Flavored Erlang: Quick Start](http://lfe.github.com/quick-start/1.html) - Attractive presentation, nice jumpstart for the language. (contributed by [@macintux](https://twitter.com/macintux)) 
-* [Thinking Forth](http://thinking-forth.sourceforge.net) - Forth is now largely eclipsed by Factor, but the book remains an inspiring look at the ideas behind this stack-based language. (contributed by [@macintux](https://twitter.com/macintux)) 
-* [Packer Documentation](http://www.packer.io/docs) - These are just lovely. 
+* [Lisp Flavored Erlang: Quick Start](http://lfe.github.com/quick-start/1.html) - Attractive presentation, nice jumpstart for the language. (contributed by [@macintux](https://twitter.com/macintux))
+* [Thinking Forth](http://thinking-forth.sourceforge.net) - Forth is now largely eclipsed by Factor, but the book remains an inspiring look at the ideas behind this stack-based language. (contributed by [@macintux](https://twitter.com/macintux))
+* [Packer Documentation](http://www.packer.io/docs) - These are just lovely.
 * [Abjad: Modeling Music in Python](http://abjad.mbrsi.org/) - Clean styling, and impressive integration of figures and diagrams. (contributed by [@adorsk](https://github.com/adorsk))
 * [SqlAlchemy](http://docs.sqlalchemy.org/) - One of the most comprehensive pieces of documentation I've ever seen, with excellent linking and layout. (contributed by [@adorsk](https://github.com/adorsk))
 * [Sonata Project](http://sonata-project.org/bundles/) - All the Sonata Project bundles for Symfony2 on a single page. These have a nice, clear layout. (contributed by [@NoScopie](https://github.com/NoScopie))
@@ -92,10 +92,11 @@ This should be updated fairly regularly. As usual, **pull requests are encourage
 * [ApiGen](http://apigen.org/) - Creates clean API documentation from PHP source code (contributed by [bryceadams](http://bryce.se/))
 * [docgenerator](https://github.com/Ralt/docgenerator/blob/master/README.md) - Organize your documentation in Markdown files. (contributed by [Florian Margaine](http://margaine.com))
 * [dexy](http://www.dexy.it/) - Extensible documentation/report generator supporting multiple programming languages and serveral input and output formats. (contributed by [troytop](http://github.com/troytop))
-* [Slate](https://github.com/tripit/slate) - Static API documentation creation tool from the team at Tripit.  
+* [Slate](https://github.com/tripit/slate) - Static API documentation creation tool from the team at Tripit.
 * [MireDot](http://www.miredot.com) - REST API documentation generator for Java. Plugs into your build process and generates a searchable html page. (contributed by [bertvh](https://github.com/bertvh))
 * [codo](https://github.com/coffeedoc/codo) - CoffeeScript API documentation generator, similar to YARD. (contributed by [Logan Koester](http://github.com/logankoester))
 * [Flatdoc](http://ricostacruz.com/flatdoc/) - Create well designed open source documentation from Github repository README files or simple Markdown files. (contributed by [@moore](http://twitter.com/moore))
 * [GitBook](https://github.com/GitbookIO/gitbook) - Utility for generating documentation, books and exercises using GitHub/Git and Markdown. (contributed by [Samy Pessé](https://github.com/SamyPesse))
 * [Daux](https://github.com/justinwalsh/daux.io) - A documentation generator that uses a simple folder structure and Markdown files to create custom documentation on the fly. It helps you create great looking documentation in a developer friendly way. (contributed by [veshinak](https://github.com/veshinak))
 * [comment.js](https://github.com/dciccale/comment.js) Simple API documentation generator. (contributed by [@dciccale](https://github.com/diccale))
+* [phpDocumentor](http://www.phpdoc.org/) - phpDocumentor enables you to generate documentation from your PHP source code. (contributed by [shivamdixit](http://shivamdixit.com))