Best All time GPL/LGPL php scripts

what are the best libraries or addon programs you use when making php sites?

[eaden]

Here are my favorites that I use all the time to create my php and mysql websites:

PhpMyAdmin [phpmyadmin.net] - the famous mysql db admin program

Smarty [smarty.php.net] - Smarty templating engine

ez_sql.php [php.justinvincent.com] - just a small class, but greatly reduces the code needed to query and display results from a db.

[jatar_k]

Have to say eaden, I am mostly a custom guy but I have used phpmyadmin quite a bit and I have heard many good things (mostly from Nick_W) about smarty.