diff --git a/backend.php b/backend.php
index 66afb06c..cc45b6a8 100644
--- a/backend.php
+++ b/backend.php
@@ -63,6 +63,10 @@
 		authenticate_user($link, "admin", null);
 	}
 
+	if ($_SESSION["uid"]) {
+		load_user_plugins($link, $_SESSION["uid"]);
+	}
+
 	$purge_intervals = array(
 		0  => __("Use default"),
 		-1 => __("Never purge"),
diff --git a/classes/pluginhost.php b/classes/pluginhost.php
index a637a521..d8df6db4 100644
--- a/classes/pluginhost.php
+++ b/classes/pluginhost.php
@@ -78,32 +78,45 @@ class PluginHost {
 			$class_file = strtolower(basename($class));
 			$file = dirname(__FILE__)."/../plugins/$class_file/$class_file.php";
 
-			if (file_exists($file)) require_once $file;
+			if (!isset($this->plugins[$class])) {
+				if (file_exists($file)) require_once $file;
 
-			if (class_exists($class) && is_subclass_of($class, "Plugin")) {
-				$plugin = new $class($this);
+				if (class_exists($class) && is_subclass_of($class, "Plugin")) {
+					$plugin = new $class($this);
 
-				$this->register_plugin($class, $plugin);
+					$this->register_plugin($class, $plugin);
+				}
 			}
 		}
 	}
 
+	function is_system($plugin) {
+		$about = $plugin->_about();
+
+		return @$about[3];
+	}
+
+	// only system plugins are allowed to modify routing
 	function add_handler($handler, $method, $sender) {
 		$handler = str_replace("-", "_", strtolower($handler));
 		$method = strtolower($method);
 
-		if (!is_array($this->handlers[$handler])) {
-			$this->handlers[$handler] = array();
-		}
+		if ($this->is_system($sender)) {
+			if (!is_array($this->handlers[$handler])) {
+				$this->handlers[$handler] = array();
+			}
 
-		$this->handlers[$handler][$method] = $sender;
+			$this->handlers[$handler][$method] = $sender;
+		}
 	}
 
 	function del_handler($handler, $method) {
 		$handler = str_replace("-", "_", strtolower($handler));
 		$method = strtolower($method);
 
-		unset($this->handlers[$handler][$method]);
+		if ($this->is_system($sender)) {
+			unset($this->handlers[$handler][$method]);
+		}
 	}
 
 	function lookup_handler($handler, $method) {
@@ -121,17 +134,22 @@ class PluginHost {
 		return false;
 	}
 
+	// only system plugins are allowed to modify commands
 	function add_command($command, $description, $sender) {
 		$command = "-" . str_replace("-", "_", strtolower($command));
 
-		$this->commands[$command] = array("description" => $description,
-			"class" => $sender);
+		if ($this->is_system($sender)) {
+			$this->commands[$command] = array("description" => $description,
+				"class" => $sender);
+		}
 	}
 
 	function del_command($command) {
 		$command = "-" . strtolower($command);
 
-		unset($this->commands[$command]);
+		if ($this->is_system($sender)) {
+			unset($this->commands[$command]);
+		}
 	}
 
 	function lookup_command($command) {
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index 447aa894..b28bd549 100644
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -1480,11 +1480,11 @@ class Pref_Feeds extends Handler_Protected {
 		print "</div>"; #pane
 
 		global $pluginhost;
+
 		$pluginhost->run_hooks($pluginhost::HOOK_PREFS_TAB,
 			"hook_prefs_tab", "prefFeeds");
 
 		print "</div>"; #container
-
 	}
 
 	private function feedlist_init_cat($cat_id, $hidden = false) {
diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index db7a3e04..bb1b44ec 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -621,8 +621,133 @@ class Pref_Prefs extends Handler_Protected {
 				<label for='prefs_show_advanced'>" .
 				__("Show additional preferences") . "</label>";
 
+		print "</form>";
 		print '</div>'; # inner pane
 		print '</div>'; # border container
+
+		print "</div>"; #pane
+
+		print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Plugins')."\">";
+
+		print "<h2>".__("Plugins")."</h2>";
+
+		print_notice("You will need to reload Tiny Tiny RSS for plugin changes to take effect.");
+
+		print "<form dojoType=\"dijit.form.Form\" id=\"changePluginsForm\">";
+
+		print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
+		evt.preventDefault();
+		if (this.validate()) {
+			notify_progress('Saving data...', true);
+
+			new Ajax.Request('backend.php', {
+				parameters: dojo.objectToQuery(this.getValues()),
+				onComplete: function(transport) {
+					notify('');
+					if (confirm(__('Selected plugins have been enabled. Reload?'))) {
+						window.location.reload();
+					}
+			} });
+
+		}
+		</script>";
+
+		print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"op\" value=\"pref-prefs\">";
+		print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"method\" value=\"setplugins\">";
+
+		print "<table width='100%'>";
+
+		print "<tr><td colspan='4'><h3>".__("System plugins")."</h3></td></tr>";
+
+		print "<tr class=\"title\">
+				<td width=\"5%\">&nbsp;</td>
+				<td width='10%'>".__('Plugin')."</td>
+				<td width=''>".__('Description')."</td>
+				<td width='5%'>".__('Version')."</td>
+				<td width='10%'>".__('Author')."</td></tr>";
+
+		$system_enabled = array_map("trim", explode(",", PLUGINS));
+		$user_enabled = array_map("trim", explode(",", get_pref($this->link, "_ENABLED_PLUGINS")));
+
+		$tmppluginhost = new PluginHost($link);
+		$tmppluginhost->load_all();
+
+		foreach ($tmppluginhost->get_plugins() as $name => $plugin) {
+			$about = $plugin->_about();
+
+			if ($about[3]) {
+				if (in_array($name, $system_enabled)) {
+					$checked = "checked='1'";
+				} else {
+					$checked = "";
+				}
+
+				print "<tr>";
+
+				print "<td align='center'><input disabled='1'
+						dojoType=\"dijit.form.CheckBox\" $checked
+						type=\"checkbox\"></td>";
+
+				print "<td>$name</td>";
+				print "<td>" . htmlspecialchars($about[1]) . "</td>";
+				print "<td>" . htmlspecialchars(sprintf("%.2f", $about[0])) . "</td>";
+				print "<td>" . htmlspecialchars($about[2]) . "</td>";
+
+				print "</tr>";
+
+			}
+		}
+
+		print "<tr><td colspan='4'><h3>".__("User plugins")."</h3></td></tr>";
+
+		print "<tr class=\"title\">
+				<td width=\"5%\">&nbsp;</td>
+				<td width='10%'>".__('Plugin')."</td>
+				<td width=''>".__('Description')."</td>
+				<td width='5%'>".__('Version')."</td>
+				<td width='10%'>".__('Author')."</td></tr>";
+
+
+		foreach ($tmppluginhost->get_plugins() as $name => $plugin) {
+			$about = $plugin->_about();
+
+			if (!$about[3]) {
+
+				if (in_array($name, $system_enabled)) {
+					$checked = "checked='1'";
+					$disabled = "disabled='1'";
+				} else if (in_array($name, $user_enabled)) {
+					$checked = "checked='1'";
+					$disabled = "";
+				} else {
+					$checked = "";
+					$disabled = "";
+				}
+
+				print "<tr>";
+
+				print "<td align='center'><input id='FPCHK-$name' name='plugins[]' value='$name' onclick='toggleSelectRow2(this);'
+					dojoType=\"dijit.form.CheckBox\" $checked $disabled
+					type=\"checkbox\"></td>";
+
+				print "<td>$name</td>";
+				print "<td>" . htmlspecialchars($about[1]) . "</td>";
+				print "<td>" . htmlspecialchars(sprintf("%.2f", $about[0])) . "</td>";
+				print "<td>" . htmlspecialchars($about[2]) . "</td>";
+
+				print "</tr>";
+
+
+
+			}
+
+		}
+
+		print "</table>";
+
+		print "<p><button dojoType=\"dijit.form.Button\" type=\"submit\">".
+			__("Enable selected plugins")."</button></p>";
+
 		print "</form>";
 
 		print "</div>"; #pane
@@ -698,5 +823,11 @@ class Pref_Prefs extends Handler_Protected {
 		}
 
 	}
+
+	function setplugins() {
+		$plugins = join(",", $_REQUEST["plugins"]);
+
+		set_pref($this->link, "_ENABLED_PLUGINS", $plugins);
+	}
 }
 ?>
diff --git a/include/functions.php b/include/functions.php
index 14b3af51..6848f14b 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -1,6 +1,6 @@
 <?php
 	define('EXPECTED_CONFIG_VERSION', 26);
-	define('SCHEMA_VERSION', 99);
+	define('SCHEMA_VERSION', 100);
 
 	$fetch_last_error = false;
 	$pluginhost = false;
@@ -711,9 +711,19 @@
 		return true;
 	}
 
+	function load_user_plugins($link, $owner_uid) {
+		if ($owner_uid) {
+			$plugins = get_pref($link, "_ENABLED_PLUGINS", $owner_uid);
+
+			global $pluginhost;
+			$pluginhost->load($plugins);
+		}
+	}
+
 	function login_sequence($link, $login_form = 0) {
 		if (SINGLE_USER_MODE) {
-			return authenticate_user($link, "admin", null);
+			authenticate_user($link, "admin", null);
+			load_user_plugins($link, $_SESSION["uid"]);
 		} else {
 			if (!$_SESSION["uid"] || !validate_session($link)) {
 
@@ -735,6 +745,10 @@
 				setcookie("ttrss_lang", $_SESSION["language"],
 					time() + SESSION_COOKIE_LIFETIME);
 			}
+
+			if ($_SESSION["uid"]) {
+				load_user_plugins($link, $_SESSION["uid"]);
+			}
 		}
 	}
 
diff --git a/plugins/digest/digest.php b/plugins/digest/digest.php
index d0cbd5b0..cb906e3c 100644
--- a/plugins/digest/digest.php
+++ b/plugins/digest/digest.php
@@ -7,7 +7,8 @@ class Digest extends Plugin implements IHandler {
 	function _about() {
 		return array(1.0,
 			"Digest mode for tt-rss (tablet friendly UI)",
-			"fox");
+			"fox",
+			true);
 	}
 
 	function __construct($host) {
diff --git a/plugins/example/example.php b/plugins/example/example.php
index 42550b17..be6a4855 100644
--- a/plugins/example/example.php
+++ b/plugins/example/example.php
@@ -9,7 +9,8 @@ class Example extends Plugin {
 	function _about() {
 		return array(1.0,
 			"Example plugin #1",
-			"fox");
+			"fox",
+			true);
 	}
 
 	function __construct($host) {
diff --git a/plugins/example_feed/example_feed.php b/plugins/example_feed/example_feed.php
index 205594ed..a0d6d19c 100644
--- a/plugins/example_feed/example_feed.php
+++ b/plugins/example_feed/example_feed.php
@@ -10,7 +10,8 @@ class Example_Feed extends Plugin {
 	function _about() {
 		return array(1.0,
 			"Example feed plugin",
-			"fox");
+			"fox",
+			true);
 	}
 
 	function __construct($host) {
diff --git a/plugins/example_routing/example_routing.php b/plugins/example_routing/example_routing.php
index 024bf5b2..f15951e0 100644
--- a/plugins/example_routing/example_routing.php
+++ b/plugins/example_routing/example_routing.php
@@ -18,7 +18,8 @@ class Example_Routing extends Plugin implements IHandler {
 	function _about() {
 		return array(1.0,
 			"Example routing plugin",
-			"fox");
+			"fox",
+			true);
 	}
 
 	function __construct($host) {
diff --git a/plugins/instances/instances.php b/plugins/instances/instances.php
index fd80ee44..2836bce5 100644
--- a/plugins/instances/instances.php
+++ b/plugins/instances/instances.php
@@ -13,7 +13,8 @@ class Instances extends Plugin implements IHandler {
 	function _about() {
 		return array(1.0,
 			"Support for linking tt-rss instances together and sharing popular feeds.",
-			"fox");
+			"fox",
+			true);
 	}
 
 	function __construct($host) {
diff --git a/plugins/updater/updater.php b/plugins/updater/updater.php
index c85ef328..2148e3c0 100644
--- a/plugins/updater/updater.php
+++ b/plugins/updater/updater.php
@@ -7,7 +7,8 @@ class Updater extends Plugin {
 	function _about() {
 		return array(1.0,
 			"Updates tt-rss installation to latest version.",
-			"fox");
+			"fox",
+			true);
 	}
 
 	function __construct($host) {
diff --git a/prefs.php b/prefs.php
index 8b554167..e20ac9ba 100644
--- a/prefs.php
+++ b/prefs.php
@@ -20,7 +20,6 @@
 	no_cache_incantation();
 
 	header('Content-Type: text/html; charset=utf-8');
-
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
diff --git a/schema/ttrss_schema_mysql.sql b/schema/ttrss_schema_mysql.sql
index 28778942..bb8bd102 100644
--- a/schema/ttrss_schema_mysql.sql
+++ b/schema/ttrss_schema_mysql.sql
@@ -308,7 +308,7 @@ create table ttrss_tags (id integer primary key auto_increment,
 
 create table ttrss_version (schema_version int not null) ENGINE=InnoDB DEFAULT CHARSET=UTF8;
 
-insert into ttrss_version values (99);
+insert into ttrss_version values (100);
 
 create table ttrss_enclosures (id integer primary key auto_increment,
 	content_url text not null,
@@ -452,6 +452,8 @@ insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) valu
 
 insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('AUTO_ASSIGN_LABELS', 1, 'true', 'Assign articles to labels automatically', 3);
 
+insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('_ENABLED_PLUGINS', 2, '', '', 1);
+
 update ttrss_prefs set access_level = 1 where pref_name in ('ON_CATCHUP_SHOW_NEXT_FEED',
 	'SORT_HEADLINES_BY_FEED_DATE',
 	'VFEED_GROUP_BY_FEED',
diff --git a/schema/ttrss_schema_pgsql.sql b/schema/ttrss_schema_pgsql.sql
index 432ebf88..3c508bb3 100644
--- a/schema/ttrss_schema_pgsql.sql
+++ b/schema/ttrss_schema_pgsql.sql
@@ -256,7 +256,7 @@ create index ttrss_tags_post_int_id_idx on ttrss_tags(post_int_id);
 
 create table ttrss_version (schema_version int not null);
 
-insert into ttrss_version values (99);
+insert into ttrss_version values (100);
 
 create table ttrss_enclosures (id serial not null primary key,
 	content_url text not null,
@@ -392,6 +392,8 @@ insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) valu
 
 insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('AUTO_ASSIGN_LABELS', 1, 'true', 'Assign articles to labels automatically', 3);
 
+insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('_ENABLED_PLUGINS', 2, '', '', 1);
+
 update ttrss_prefs set access_level = 1 where pref_name in ('ON_CATCHUP_SHOW_NEXT_FEED',
 	'SORT_HEADLINES_BY_FEED_DATE',
 	'VFEED_GROUP_BY_FEED',
diff --git a/schema/versions/mysql/100.sql b/schema/versions/mysql/100.sql
new file mode 100644
index 00000000..a360dab6
--- /dev/null
+++ b/schema/versions/mysql/100.sql
@@ -0,0 +1,7 @@
+begin;
+
+insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('_ENABLED_PLUGINS', 2, '', '', 1);
+
+update ttrss_version set schema_version = 100;
+
+commit;
diff --git a/schema/versions/pgsql/100.sql b/schema/versions/pgsql/100.sql
new file mode 100644
index 00000000..a360dab6
--- /dev/null
+++ b/schema/versions/pgsql/100.sql
@@ -0,0 +1,7 @@
+begin;
+
+insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('_ENABLED_PLUGINS', 2, '', '', 1);
+
+update ttrss_version set schema_version = 100;
+
+commit;