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This document is a work in progress and compiles information on architectural, built-in and stand-alone accessibility solutions in mobile devices.

Background and General Information

Sources:

OS / Platform	Market Share	License	Company	Supported Handsets	SDK / price	Sign-up required	Primary UI	Licensing
Symbian OS	~45%	Open Source	Symbian	Full list	Symbian-UIQ SDK / free	Yes
Blackberry OS	~20%	Proprietary	RIM	Most Blackberry devices	Blackberry JDE / free		Java
Windows Mobile	~10%	Proprietary	Microsoft
iPhone OS	~10%	Proprietary	Apple	iPhone	iPhone SDK / free	Yes	Cocoa Touch/Objective-C
Linux / Motodev	>10%	Open Source (kernel proprietary)	Motorola	Full list	Eclipse plugin / community edition free	Yes	Qt	Free (some services cost extra)
Linux / Android	>5%	Open Source	OHA / Google	Available in second half of 2008	Android SDK / free (Setup Guide)	No	Java
Palm OS	>5%	Proprietary						Free (some services cost extra)
Linux / OpenMoko	>2%	Open Source	FIC / OE	Neo1973, Neo FreeRunner	OpenEmbedded / free	No	GTK+	Free
Linux / Maemo	>2%	Open Source	Nokia	N810 - N800 - 770	VistaMax, Laika / (some parts require a device)	OS requires valid device ID	GTK+	Free (device required for some OS bits)
Linux / Qtopia	>2%	Open Source (for non-commercial applications)	Trolltech	Full list	Qt Tools / community edition free		Qt	Free (non-commercial only)
Linux / Access Linux Platform	>1%	Open Source	Access Inc.		ALP Development Tools / free	No	GTK+	Free
Linux / LiMo Platform	>1%	Proprietary / some open source components	Limo Foundation	Full list	Only available to members	Yes		Membership required

Most of the tools below are either free or require a free account from mobiforge.com"

Mobile Web Developer's Guide
This is quite a comprehensive guide to mobile web development. It layers on the advice from the W3C's Mobile Web Initiative Mobile Web Best Practices 1.0 document, but takes it further.
Mobile Device Information Database (free for developers)
DeviceAtlas is an on-line resource, you can view the mobile device information by navigating around the site or download an API for use in your application.
ATRC Web Accessibility Checker
This tool checks Web-based HT ML content for conformance with accessibility standards to ensure the content can be accessed by everyone.
W3C mobileOK Checker
This checker performs various tests on a Web Page to determine its level of mobile-friendliness. The tests are defined in the mobileOK Basic Tests 1.0 specification. A Web Page is mobileOK when it passes all the tests.
Mobile Web Industry Best Practices and Standards Checker
The mobiReady testing tool evaluates mobile-readiness using industry best practices & standards.
The free report provides both a score (from 1 to 5) and in-depth analysis of pages to determine how well your site performs on a mobile device.
Mobile Device Web Emulator
To see your site the same way these millions of mobile users do, try the dotMobi mobile phone emulator, which "emulates" a real mobile phone Web browser.

Talks Platform: Symbian
Running on Symbian™ Series 60 phones, Nuance TALKS converts the displayed text on the mobile handset into highly intelligible speech. With Nuance TALKS, blind and low-vision users can take advantage of most features, including contact directories, caller ID, text messages, help files, access to the Nokia web browser, and other screen content, available on their mobile phones.

iConverse Platform: iPhone/Touch
iConverse is an educational tool designed for young children and individuals with communicative disabilities, and also toddler-aged children who have yet to master language. iConverse is an Augmentative Alternative Communication (AAC) application for the iPhone and iPod Touch that replaces bulky and expensive communication devices used in the past. iConverse gives users the ability to carry an AAC device in their pocket creating a means of communication that is appropriate, effective and discreet.

Speech Enabled Eyes-Free Android Applications Platform: Google Android
The Text-To-Speech (TTS) library is allows developers to add speech to their applications. Developers give the TTS object a text string, and the TTS will take care of converting that string to text and speaking it to the user. See the video