Phone.com, makers of the UP Browser (UP referring to the former name of the company, Unwired Planet).
Be sure to download the UP.SDK.
Also, see the Tech Library available in their "Developer" Portion of the site.
You'll need to register (free) and login to access each of those.
Nokia is a maker of WAP-enabled phones, and the WAP section of their site also offers lots of useful information and tools (WAP Client and WAP Toolkit).
Ericsson is another maker of WAP-enabled phones, and has WAP resources.
ColdFusion Custom tag (no charge) for doing notifications, alerts, digests, and faxes on phone.com-compliant browsers. Thanks to Marcello Frutig.
