Here are some excellent open source sites that in some way relates to WAP and the wireless environment.
  
OpenWAP.org, promoting open source WAP development and informing the WAP community of news. Kannel.org, an open source WAP Gateway project (previously wapgateway.org) WMLbrowser.org open source project maintained by 5NINE to create a WML browser that runs in all Linux environments. LEAP (Lightweight & Efficient Application Protocols), an open wireless protocol suite specification Silocon Penquin Embedded Linux Authority