I need to design a wireless network, but am having difficulty selecting the parts. Are there any public tools available to help select the appropriate radios and accessories for my network?

Yes. The ProSoft Wireless Designer (PWD) is a free utility that will help you:
* Evaluate your project
* Determine if a site survey is necessary
* Quickly generate a Bill of Materials for:
- Radios, Antennas and Antenna Cables
* Provide you with technical expertise and radio application advise.
You can download a complimentary copy of ProSoft Wireless Designer using this link:
http://www.prosoft-technology.com/Products/ProSoft-Software/ProSoft-Wireless-Designer