A range of developer information is available on Trolltech websites:

Developer Quickstart Guide
Essential information on how to develop for Qtopia Greenphone using the Qtopia Greenphone SDK.
 www.qtopia.net/modules/mydownloads/cache/files/greenphone_quickstart.pdf

Greenphone Getting Started Guide
This explains how to use your phone.
www.qtopia.net/modules/mydownloads/cache/files/greenphone_gettingstarted.pdf

Greenphone User Guide
This guide explains how to use your Greenphone. Basic instructions are provided to get you started together with detailed explanation of the functions available on the Greenphone. www.qtopia.net/modules/mydownloads/cache/files/greenphone_userguide_4.pdf

Greenphone SDK System Requirements
www.qtopia.net/modules/devices/greenphone_system.php

Greenphone Hardware and Software Specifications
www.trolltech.com/products/qtopia/greenphone/greenphonespecs

Greenphone SDK Features
doc.trolltech.com/qtopia4.2/qtopia-components.html

Greenphone FAQ
www.trolltech.com/products/qtopia/greenphone/greenphonefaq

Technical Support FAQs
www.trolltech.com/developer/faqs/Qtopia/Greenphone

Qtopia Developer Resources:
doc.trolltech.com/qtopia4.1/index.html

Installing Qtopia Source Code:
www.qtopia.net/modules/devices/greenphone-src.php

SDK Downloads and Updates:
www.qtopia.net/modules/devices/greenphone_updates.php

Qtopia Tutorials
www.qtopia.net/modules/sections/

Known Issues
www.qtopia.net/modules/devices/greenphone_knownissues.php