All About Symbian: Community offering user support, news, reviews and software for Symbian based phones.
My-Symbian.com: Portal for users of Symbian based communicators and smartphones. Includes news, software downloads and both English and Polish language discussion forums.
Series 60 Platform: Smartphone platform for Symbian OS which incorporates a user interface and some supporting functions such as messaging and calendar. Includes a software development kit for the platform, details of recently developed applications and information on devices currently using it.
Symbian SDK on Unix HOWTO: Describes a method for getting some parts of the Symbian SDK going on a Unix machine.
Symbian Signed: Application digital signing programme run by Symbian. Includes details of test criteria, a FAQ and details of the process to be followed by developers.
SymbianOne: Resource site for Symbian developers. Includes news, product review, technical information on Symbian based devices and discussion forums.
SymbianOS.org: Portal site for open source developers. Includes links to projects, discussion forums, mailing lists and a CVS repository.
The Smartphone Show: Symbian sponsored mobile industry conference featuring seminars, training and a tradeshow arena. Annual event held in London, UK.
UIQ Technology: Developers of a mobile phone user interface that uses the Symbian platform. Includes phones currently sporting the interface and a downloadable software development kit for the UIQ platform.
Wikipedia.org: Article discussing the operating system, its history and devices that use it.