Farpoint Group –
As wireless LANs get more sophisticated, more and more functionality that used to be required in add-on products is now standard issue. For most network managers, what comes with a given product is usually sufficient. These tools include basic diagnostics, a site survey application (to get an indication of the radio propagation environment within your building, as well as a fundamental idea of where the access points need to go and how many are required to provide at least basic coverage), and other utilities to install and maintain your infrastructure and clients. Most access points are administered via a simple Web-based interface, and even security features are easy to set up.
Still there is a huge array of products out there for those who want to dig deeper or address special needs. By no means exhaustive, here