Video

• Basics video tutorial on Odoo

Version 9

• Technical doc
• Functional doc
• API doc
• Installing doc

Version 8

• Official odoo v8 docs
• Official odoo v8 docs  (github source code)
• Odoo v8 database scheme (Thanks go to Borut Jures for his work)
• Odoo’s new v8 API guidelines (From OpenDays 2014)
• OpenERP v8 book (Community written)
• Official odoo how-to docs (Community written, odoo approved)

Version 7

• Official OpenERP v7 docs
• Official OpenERP Web Developers Documentation v7
• Official OpenERP Technical Memento v0.7.4 (French Version)
• OpenERP v7 docs (Written by odoo silver partner – erpweb)

• How to test a new contribution on runbot ?

This information has been taken from here.