Connectify Hotspot - Connectify Me hotspot is a PC app that turns your computer into a Wi-Fi hotspot.
TamoGraph Site Survey - Wi-Fi site coverage survey and modelling application
Virtual Router Plus - Download Virtual Router Plus Windows Wifi Hotspot for free.
Waircut - Free network audit app
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.