Expert in PHP and MySQL
Understand HTML well
Understand CSS
Understand AJAX
Understand Frameworks
Understand XHTML (tableless)
BLOG :
Serendipity
Open Blog
b2evolution
LifeType
WordPress
Nucleus,
PORTAL CMS :
Zikula
Xoops
website baker
aNews
Drupal
Mambo
typo3,
FORUM :
MyBB
punBB
SMF
AEF,
IMAGE GALLERIES :
Piwigo
Shutter
4images
and many more..... -_-