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:
SimpleWall [24]
FortKnox Firewall [25]
TinyWall [26]
Windows 10 Firewall Control [27]
Windows Firewall Notifier [28]
Windows Firewall Control [29]
Rising Personal Firewall [30]
Filseclab Personal Firewall Professional Edition [31]
Safety.Net [32]
GhostWall [33]
Sygate Personal Firewall Free [34]
SoftPerfect Personal Firewall [35]
Kerio Personal Firewall [36]
R-Firewall [37]
Ashampoo Firewall [38]
WIPFW [39]
nDispatcher [40]
DCFirewall [41]
Xvirus Personal Firewall [42]
Network perimeter security-related operating systems:
Subsections follow:
1. Containing at least a firewall:
List of router and firewall distributions [43]
Smoothwall Express [44]
Pfsense [45]
IPCop [46]
m0n0wall [47]
IPFire [48]
Devil-Linux [49]
LEAF [50]
Zeroshell [51]
Coyote Linux [52]
RusRoute [53]
FREESCO [54]
MikroTik RouterOS [55]
floppyfw [56]
redWall Firewall [57]
Sentry Firewall CD [58]
2. Unified threat management (UTM):
Endian Firewall Community [59]
ClearOS Community [60]
Untangle NG Firewall Free [61]
[62]Sophos UTM Home [63]
Zentyal Community [64]
3. Router alternative firmware:
List of router and firewall distributions [43]
Tomato [65]
DD-WRT [66]
OpenWrt [67]
RouterTech [68]
Talisman/Basic [69]
XORP [70]
Read/Post comments [71]