Sophos UTM - Sophos UTM integrates complete security software within a single appliance.
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.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Virtual Router Plus - Download Virtual Router Plus Windows Wifi Hotspot for free.
OPNsense - OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.
Maryfi - Maryfi is a software program designed for laptops to start their own wireless hotspots.