The very simplest repository browser you could imagine, as a WordPress plugin

diff --git a/wp-fdroid/readme.txt b/wp-fdroid/readme.txt
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+\r
+=== WP FDroid ===\r
+Contributors: CiaranG\r
+Tags: android, repository\r
+Requires at least: 2.9\r
+Tested up to: 2.9\r
+Stable tag: 0.1\r
+\r
+Provides the ability to browse the contents of an FDroid repository.\r
+\r
+== Description ==\r
+\r
+This plugin provides the ability to browse the contents of an FDroid\r
+repository. The repository browser can be inserted into the site by\r
+creating a page containing the 'fdroidrepo' shortcode.\r
+\r
+License: GPL v3\r
+\r
+== Installation ==\r
+\r
+1. Download and extract the zip file.\r
+2. Upload the plugin directory to /wp-content/plugins on your server.\r
+3. Go to the Plugins screen in your Wordpress Admin and activate it.\r
+\r
+== Frequently Asked Questions ==\r
+\r
+= Is this finished? =\r
+\r
+No it isn't. I'm working on it.\r
+\r
+== Screenshots ==\r
+\r
+1. There isn't one yet actually.\r
+\r

diff --git a/wp-fdroid/wp-fdroid.php b/wp-fdroid/wp-fdroid.php
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+<?php\r
+/*\r
+Plugin Name: WP FDroid\r
+Plugin URI: http://f-droid.org/repository\r
+Description: An FDroid repository browser\r
+Author: Ciaran Gultnieks\r
+Version: 0.01\r
+Author URI: http://ciarang.com\r
+\r
+Revision history\r
+0.01 - 2010-12-04: Initial development version\r
+\r
+*/\r
+\r
+class FDroid\r
+{\r
+\r
+       // Our text domain, for internationalisation\r
+       var $textdom='wp-fdroid';\r
+\r
+       // Constructor\r
+       function FDroid() {\r
+               // Add filters etc here!\r
+               add_shortcode('fdroidrepo',array($this, 'do_shortcode'));\r
+               add_filter('query_vars',array($this, 'queryvars'));\r
+               $this->inited=false;\r
+       }\r
+\r
+\r
+       // Register additional query variables. (Handler for the 'query_vars' filter)\r
+       function queryvars($qvars) {\r
+               $qvars[]='fdfilter';\r
+               $qvars[]='fdid';\r
+               $qvars[]='fdpage';\r
+               return $qvars;\r
+       }\r
+\r
+\r
+       // Lazy initialise. All non-trivial members should call this before doing anything else.\r
+       function lazyinit() {\r
+               if(!$this->inited) {\r
+                       load_plugin_textdomain($this->textdom, PLUGINDIR.'/'.dirname(plugin_basename(__FILE__)), dirname(plugin_basename(__FILE__)));\r
+\r
+                       $this->inited=true;\r
+               }\r
+       }\r
+\r
+       // Gets a required query parameter by name.\r
+       function getrequiredparam($name) {\r
+               global $wp_query;\r
+               if(!isset($wp_query->query_vars[$name]))\r
+                       wp_die("Missing parameter ".$name,"Error");\r
+               return $wp_query->query_vars[$name];\r
+       }\r
+\r
+       // Make a link to this page, with the given query parameter string added\r
+       function makelink($params) {\r
+               $link=get_permalink();\r
+               if(strlen($params)==0)\r
+                       return $link;\r
+               if(strpos($link,'?')===false)\r
+                       $link.='?';\r
+               else\r
+                       $link.='&';\r
+               $link.=$params;\r
+               return $link;\r
+       }\r
+\r
+       // Handler for the 'fdroidrepo' shortcode.\r
+       //  $attribs - shortcode attributes\r
+       //  $content - optional content enclosed between the starting and ending shortcode\r
+       // Returns the generated content.\r
+       function do_shortcode($attribs,$content=null) {\r
+               global $wp_query,$wp_rewrite;\r
+               $this->lazyinit();\r
+\r
+               $page=1;\r
+               if(isset($wp_query->query_vars['fdpage'])) {\r
+                       $page=(int)$wp_query->query_vars['fdpage'];\r
+                       if($page==0)\r
+                               $page=1;\r
+               }\r
+\r
+               $filter=null;\r
+               if(isset($wp_query->query_vars['fdfilter']))\r
+                       $filter=$wp_query->query_vars['fdfilter'];\r
+\r
+               $out=$this->get_apps($page,$filter);\r
+               return $out;\r
+\r
+       }\r
+\r
+\r
+\r
+       function get_apps($page,$filter=null) {\r
+\r
+               if($filter===null)\r
+                       $out="<p>All applications";\r
+               else\r
+                       $out="<p>Applications matching ".$filter;\r
+               $out.="</p>";\r
+\r
+               $perpage=10;\r
+               $skipped=0;\r
+               $got=0;\r
+               $total=0;\r
+\r
+               $xml = simplexml_load_file("/home/fdroid/public_html/repo/index.xml");\r
+               foreach($xml->children() as $app) {\r
+\r
+                       foreach($app->children() as $el) {\r
+                               switch($el->getName()) {\r
+                                       case "name":\r
+                                               $name=$el;\r
+                                               break;\r
+                               }\r
+                       }\r
+\r
+                       if($filter===null || stristr($name,$filter)) {\r
+                               if($skipped<($page-1)*$perpage) {\r
+                                       $skipped++;\r
+                               } else if($got<$perpage) {\r
+                                       $out.="<p>".$name."</p>";\r
+                                       $got++;\r
+                               }\r
+                               $total++;\r
+                       }\r
+\r
+               }\r
+\r
+               $numpages=ceil((float)$total/$perpage);\r
+\r
+               $out.='<p>';\r
+               if($page==1) {\r
+                       $out.="&lt;&lt;first ";\r
+                       $out.="&lt;prev ";\r
+               } else {\r
+                       $out.='<a href="'.$this->makelink("fdpage=1").'">&lt;&lt;first</a> ';\r
+                       $out.='<a href="'.$this->makelink("fdpage=".($page-1)).'">&lt;&lt;prev</a> ';\r
+               }\r
+               $out.=" Page $page of $numpages ";\r
+               if($page==$numpages) {\r
+                       $out.="next&gt; ";\r
+                       $out.="last&gt;&gt; ";\r
+               } else {\r
+                       $out.='<a href="'.$this->makelink("fdpage=".($page+1)).'">next&gt;</a> ';\r
+                       $out.='<a href="'.$this->makelink("fdpage=".$numpages).'">last&gt;&gt;</a> ';\r
+               }\r
+               $out.='</p>';\r
+\r
+               return $out;\r
+       }\r
+\r
+\r
+\r
+}\r
+\r
+$wp_fdroid = new FDroid();\r
+\r
+\r
+?>\r