Magento – All reviews on one page

Yes, it's simple to add these lines to local.xml file

<reference name="product.info">
    <block type="page/html_pager" name="product_review_list.toolbar" />
    <block type="core/template" name="product_review_list.count" template="review/product/view/count.phtml" />
     <block type="review/product_view_list" name="product_customer_reviews" as="product_customer_reviews" template="review/product/view/list.phtml">
        <block type="review/form" name="product.review.form" as="review_form">
            <block type="page/html_wrapper" name="product.review.form.fields.before" as="form_fields_before" translate="label">
                <label>Review Form Fields Before</label>
                <action method="setMayBeInvisible"><value>1</value></action>
            </block>
        </block>
    </block> 
</reference>

for -> Recently Viewed see here

for ->Sorting by rating

Copy the file

app/code/core/Mage/Catalog/Block/Product/List.php to

app/code/local/Mage/Catalog/Block/Product/List.php

in list.php find for this line

$this->_productCollection =$layer->getProductCollection();

which will be in around line no 86 add the following code after that

$this->_productCollection->joinField('rating_summary', 'review_entity_summary', 'rating_summary', 'entity_pk_value=entity_id', array('entity_type'=>1, 'store_id'=> Mage::app()->getStore()->getId()), 'left')

now copy

app/code/core/Mage/Catalog/Model/Config.php to

app/code/local/Mage/Catalog/Model/Config.php

in config.php find for this code

$options = array(
    'position'  => Mage::helper('catalog')->__('Position')
);

replace with

$options = array(
    'position'  => Mage::helper('catalog')->__('Position'),
    'rating_summary' => Mage::helper('catalog')->__('Rating')
);

-->>for BESTSELLER

follow this procedure create a folder naming Inchoo and inside that folder place Catalog and inside catalog create 3 folders Block,etc and Model In Block add Product in Product add List and in List create a file and name it as Toolbar.php and ad this code into it

<?php
class Inchoo_Catalog_Block_Product_List_Toolbar extends Mage_Catalog_Block_Product_List_Toolbar
{
    public function setCollection($collection)
    {
        parent::setCollection($collection);

        if ($this->getCurrentOrder()) {
            if($this->getCurrentOrder() == 'qty_ordered') {
                $this->getCollection()->getSelect()
                     ->joinLeft(
                            array('sfoi' => $collection->getResource()->getTable('sales/order_item')),
                             'e.entity_id = sfoi.product_id',
                             array('qty_ordered' => 'SUM(sfoi.qty_ordered)')
                         )
                     ->group('e.entity_id')
                     ->order('qty_ordered ' . $this->getCurrentDirection());
            } else {
                $this->getCollection()
                     ->setOrder($this->getCurrentOrder(), $this->getCurrentDirection())->getSelect();
            }
        }

        return $this;
    }
}

now in etc folder create a file with name config.xml and add this code

<config>
    <modules>
        <Inchoo_Catalog>
            <version>0.1.0</version>
        </Inchoo_Catalog>
    </modules>
    <global>
        <blocks>
            <catalog>
                <rewrite>
                    <product_list_toolbar>Inchoo_Catalog_Block_Product_List_Toolbar</product_list_toolbar>
                </rewrite>
            </catalog>
        </blocks>
        <models>
            <catalog>
                <rewrite>
                    <config>Inchoo_Catalog_Model_Config</config>
                </rewrite>
            </catalog>
            <catalog_resource>
                <rewrite>
                    <product_collection>Inchoo_Catalog_Model_Resource_Product_Collection</product_collection>
                </rewrite>
            </catalog_resource>
        </models>
    </global>
</config>

Now in Model create a file naming Config.php and add this code.

<?php class Inchoo_Catalog_Model_Config extends Mage_Catalog_Model_Config
{
    public function getAttributeUsedForSortByArray()
    {
        return array_merge(
            parent::getAttributeUsedForSortByArray(),
            array('qty_ordered' => Mage::helper('catalog')->__('Sold quantity'))
        );
    }
}

also create Resource folder in Model and in Resource folder create Product folder and create a file naming Collection.php and add following code.

<?php
class Inchoo_Catalog_Model_Resource_Product_Collection extends Mage_Catalog_Model_Resource_Product_Collection
{
    protected function _getSelectCountSql($select = null, $resetLeftJoins = true)
    {
       $this->_renderFilters();
       $countSelect = (is_null($select)) ?
           $this->_getClearSelect() :
           $this->_buildClearSelect($select);

       if(count($countSelect->getPart(Zend_Db_Select::GROUP)) > 0) {
           $countSelect->reset(Zend_Db_Select::GROUP);
       }

       $countSelect->columns('COUNT(DISTINCT e.entity_id)');
       if ($resetLeftJoins) {
           $countSelect->resetJoinLeft();
       }
       return $countSelect;
    }
}

Now finally activate this module by going to app/etc/modules create a file Inchoo_Catalog.xml add this code.

<?xml version="1.0"?>
<!--
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Academic Free License (AFL 3.0)
 * that is bundled with this package in the file LICENSE_AFL.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/afl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Connect
 * @copyright   Copyright (c) 2014 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 */
-->
<config>
    <modules>
        <Inchoo_Catalog>
            <active>true</active>
            <codePool>community</codePool>
            <depends />
        </Inchoo_Catalog>
    </modules>
</config>

and for SALE I suggest you this extension as I cannot find any programmatic way to achieve this.