Connectify Hotspot - Connectify Me hotspot is a PC app that turns your computer into a Wi-Fi hotspot.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
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.
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
Maryfi - Maryfi is a software program designed for laptops to start their own wireless hotspots.
Homedale - With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.