Information:
Best Free Firewall Protection

Windows built-in firewall:
Windows 10 Firewall Control 
XP firewall guide
Configuring XP firewall
Vista firewall guide
Firewall App Blocker
Diagnose and fix Windows Firewall service problems
Windows8FirewallPanel

Third-party firewalls with alert-based non-network behavior containment/detection:
Comodo Firewall
ZoneAlarm Free Firewall
Privatefirewall
Outpost Firewall Free
Online Armor Free
AVS Firewall
GlassWire
Jetico Personal Firewall
Sunbelt Personal Firewall (trial) ; functionality present after trial is over
PC Tools Firewall Plus

Third-party firewalls without alert-based non-network behavior containment/detection:
SimpleWall
FortKnox Firewall
TinyWall
Windows 10 Firewall Control
Windows Firewall Notifier
Windows Firewall Control
Rising Personal Firewall
Filseclab Personal Firewall Professional Edition
Safety.Net
GhostWall
Sygate Personal Firewall Free
SoftPerfect Personal Firewall
Kerio Personal Firewall
R-Firewall
Ashampoo Firewall
WIPFW
nDispatcher
DCFirewall
Xvirus Personal Firewall

Network perimeter security-related operating systems:
Subsections follow:

1. Containing at least a firewall:
List of router and firewall distributions
Smoothwall Express
Pfsense
IPCop
m0n0wall
IPFire
Devil-Linux
LEAF
Zeroshell
Coyote Linux
RusRoute
FREESCO
MikroTik RouterOS
floppyfw
redWall Firewall
Sentry Firewall CD

2. Unified threat management (UTM):
Endian Firewall Community
ClearOS Community
Untangle NG Firewall Free
Sophos UTM Home
Zentyal Community

3. Router alternative firmware:
List of router and firewall distributions
Tomato
DD-WRT
OpenWrt
RouterTech
Talisman/Basic
XORP

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