Homedale - With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.
mHotspot - mHotspot is a completely free software which converts your windows 7 & 8 laptop into a virtual wifi router and creates a secure wifi hotspot.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
Virtual Router Plus - Download Virtual Router Plus Windows Wifi Hotspot for free.
iBwave Wi-Fi - iBwave Wi-Fi software suite brings smart networking solutions to enterprise, education, hospitality, transportation, retail, office, healthcare, public venues, and residential wireless networks.
Maryfi - Maryfi is a software program designed for laptops to start their own wireless hotspots.