Magento : Installing Free Extensions Without Magento Connect Manager

If you don't have Magento connect manager on your current Magento version.

Just follows the below steps:

1) Search the free extension which you want from the Magento connect site

(http://www.magentocommerce.com/magento-connect/) and then find the extension key.

2) Open your FTP File Zilla and fillup the below credentials:

Host:connect20.magentocommerce.com
User: anonymous
Pass: (No password required
You will be connected to the Magento community FTP.

3) Now just navigate to folder /community/Your Extension Folder Name or Ext Key and download the zip format of your extension.