Free Windows Desktop Software Security List - Firewalls [1]
FirewallsInformation:
Best Free Firewall Protection [4]
[5]Windows built-in firewall:
Windows 10 Firewall Control [6]
XP firewall guide [7]
Configuring XP firewall [8]
Vista firewall guide [9]
Firewall App Blocker [10]
Diagnose and fix Windows Firewall service problems [11]
Windows8FirewallPanel [12]
Third-party firewalls with alert-based non-network behavior containment/detection:
Comodo Firewall [13]
ZoneAlarm Free Firewall [14]
Privatefirewall [15]
Outpost Firewall Free [16] 
Online Armor Free [17]
AVS Firewall [18]
GlassWire [19]
Jetico Personal Firewall [20]
Sunbelt Personal Firewall [21] (trial) ; functionality present after trial is over [22]
PC Tools Firewall Plus [23]
Third-party firewalls without alert-based non-network behavior containment/detection:
FortKnox Firewall [24]
TinyWall [25]
Windows 10 Firewall Control [26]
Windows Firewall Notifier [27]
Windows Firewall Control [28]
Rising Personal Firewall [29]
Filseclab Personal Firewall Professional Edition [30]
Safety.Net [31]
GhostWall [32]
Sygate Personal Firewall Free [33]
SoftPerfect Personal Firewall [34]
Kerio Personal Firewall [35]
R-Firewall [36]
Ashampoo Firewall [37]
WIPFW [38]
nDispatcher [39]
DCFirewall [40]
Xvirus Personal Firewall [41]
Network perimeter security-related operating systems:
Subsections follow:
1. Containing at least a firewall:
List of router and firewall distributions [42]
Smoothwall Express [43]
Pfsense [44]
IPCop [45]
m0n0wall [46]
IPFire [47]
Devil-Linux [48]
LEAF [49]
Zeroshell [50]
Coyote Linux [51]
RusRoute [52]
FREESCO [53]
MikroTik RouterOS [54]
floppyfw [55]
redWall Firewall [56]
Sentry Firewall CD [57]
2. Unified threat management (UTM):
Endian Firewall Community [58]
ClearOS Community [59]
Untangle NG Firewall Free [60]
[61]Sophos UTM Home [62]
Zentyal Community [63]
3. Router alternative firmware:
List of router and firewall distributions [42]
Tomato [64]
DD-WRT [65]
OpenWrt [66]
RouterTech [67]
Talisman/Basic [68]
XORP [69]
Read/Post comments [70]