Useful SQL*Plus headers
Dino eats frog
Oracle with Active Record
When is he free?
Gentle dive into analytic functions
« Making spam go splat
» Organization Objects
O'Reilly Net: "These include tools to do database backups and tuning; technologies for easier database programming and interaction within a wide range or languages; and tools for schema management, application design, and to help DBAs."
A good link fest.