Must know Open source Applications in PHP

This list contains the applications which every one should learn. There is good career opportunity in this applications.

E-Commerce / Shopping Cart :

1. Magento
2. Virtue Mart
3. OSCommerce
   
4. Pestrashop
5. Freeway
6. Zencart

CMS

1. Wordpress
2. Joomla
3. Mambo
4. phpnuke

Content management Framework

1. Drupal

ELearning / LMS

1. Moodle
2. eFront
3. Atutor
4. DokeOS
5. Illas
6. Drupaled