Open source Windows firewall Created by Winsock iSafer works in Windows 9X/NT/2K/XP only and there is no plan for any changes.
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iSafer
Alternatives
| # | Image | App Name | Features | Platforms | Price | Website Link |
| 1 |  |
Windows Firewall Notifier | Windows | Free | Website | |
| 2 |  |
ZoneAlarm Free Firewall | Windows | Freemium | Website | |
| 3 |  |
PC Tools Firewall Plus | Discontinued | Windows | Free | Website |
| 4 | GlassWire Alternatives and Similar Software | Windows Android Android Tablet Android |
Free with limited functionality | Website | ||
| 5 | TinyWall Alternatives and Similar Software | Windows Windows |
Free | Website | ||
| 6 | ShaPlus Bandwidth Meter | Windows | Free | Website | ||
| 7 |  |
Windows 10 Firewall Control | Windows | Freemium | Website | |
| 8 |  |
Privatefirewall | Discontinued | Windows | Free | Website |
| 9 |  |
Gufw | Linux | Free | Website | |
| 10 |  |
AppNetworkCounter | Windows | Free | Website |