TDI Personal Firewall
Simple TDI-Based Open Source Personal Firewall for Windows NT4/2000/XP/2003.
DeleGate
DeleGate is a multi-purpose application level gateway, or a proxy server which runs on multiple platforms (Unix, Windows, MacOS X and OS/2).
PktFilter
PktFilter is a software that can configure the IP filtering device driver found in Windows 2000/XP/Server 2003, with filtering rules following a syntax similar to IP Filter.
WIPFW
WIPFW is a MS Windows operable version of IPFW for FreeBSD OS.
iSafer
iSafer is a Firewall which runs in the socket layer.
Misspellings: direwall, cirewall, virewall, girewall, tirewall, rirewall, furewall, fjrewall, fkrewall, forewall, f9rewall, f8rewall, fieewall, fidewall, fifewall, fitewall, fi5ewall, fi4ewall, firwwall, firswall, firdwall, firrwall, fir4wall, fir3wall, fireqall, fireaall, firesall, fireeall, fire3all, fire2all, firewzll, firewsll, firewwll, firewqll, firewakl, firewapl, firewaol, firewalk, firewalp, firewalo, irewall, frewall, fiewall, firwall, fireall, firewll, firewal, firewal, ifrewall, friewall, fierwall, firweall, fireawll, firewlal, firewall, ffirewall, fiirewall, firrewall, fireewall, firewwall, firewaall, firewalll, firewalll