Free Windows Desktop Software Security List - Firewalls [1]
FirewallsInformation:
Best Free Firewall Protection [4]
[5]Windows built-in firewall:
XP firewall guide [6]
Configuring XP firewall [7]
Vista firewall guide [8]
Firewall App Blocker [9]
Diagnose and fix Windows Firewall service problems [10]
Windows8FirewallPanel [11]
Third-party firewalls with alert-based non-network behavior containment/detection:
Comodo Firewall [12]
ZoneAlarm Free Firewall [13]
Privatefirewall [14]
Outpost Firewall Free [15] 
Online Armor Free [16]
AVS Firewall [17]
GlassWire [18]
Jetico Personal Firewall [19]
Sunbelt Personal Firewall [20] (trial) ; functionality present after trial is over [21]
PC Tools Firewall Plus [22]
Third-party firewalls without alert-based non-network behavior containment/detection:
FortKnox Firewall [23]
TinyWall [24]
Windows 10 Firewall Control [25]
Windows Firewall Notifier [26]
Windows Firewall Control [27]
Rising Personal Firewall [28]
Filseclab Personal Firewall Professional Edition [29]
Safety.Net [30]
GhostWall [31]
Sygate Personal Firewall Free [32]
SoftPerfect Personal Firewall [33]
Kerio Personal Firewall [34]
R-Firewall [35]
Ashampoo Firewall [36]
WIPFW [37]
nDispatcher [38]
DCFirewall [39]
Xvirus Personal Firewall [40]
Network perimeter security-related operating systems:
Subsections follow:
1. Containing at least a firewall:
List of router and firewall distributions [41]
Smoothwall Express [42]
Pfsense [43]
IPCop [44]
m0n0wall [45]
IPFire [46]
Devil-Linux [47]
LEAF [48]
Zeroshell [49]
Coyote Linux [50]
RusRoute [51]
FREESCO [52]
MikroTik RouterOS [53]
floppyfw [54]
redWall Firewall [55]
Sentry Firewall CD [56]
2. Unified threat management (UTM):
Endian Firewall Community [57]
ClearOS Community [58]
Untangle NG Firewall Free [59]
[60]Sophos UTM Home [61]
Zentyal Community [62]
3. Router alternative firmware:
List of router and firewall distributions [41]
Tomato [63]
DD-WRT [64]
OpenWrt [65]
RouterTech [66]
Talisman/Basic [67]
XORP [68]
Read/Post comments [69]