I don't know of any product right off that has all the features of Network Magic, but with a quick search I found WiFi Manager 5 (FREE)
http://www.adventnet.com/free-softwares-download.html Note that there is a "professional" version also available for a price.
You can use Network Magic FREE after the 30 day trial as long as you don't need the printer and file sharing features (what I'm doing). All other features will function. Frankly, I'd rather share a printer using a network print server so it's always available.
You can also try searching the CNET downloads area and other similar forums for this type of software.
Im looking for an alternative to network magic. I like all the features that network magic offers, but i dont want to pay money for it. Does anyone know of a good, free home network management program.