Three free, open source, products:
KisMAC (supports passive scanning): http://trac.kismac-ng.org/
AP Grapher (cutesy graphs): http://www.chimoosoft.com/products/apgrapher/
iStumbler (somewhere in-between): http://www.istumbler.net/
Three free, open source, products:
KisMAC (supports passive scanning): http://trac.kismac-ng.org/
AP Grapher (cutesy graphs): http://www.chimoosoft.com/products/apgrapher/
iStumbler (somewhere in-between): http://www.istumbler.net/