Free & Open-Source ESET NOD32 Alternatives

Lightweight antivirus engine.

1. ClamTk ↗ ★ PICKFOSSPRIVATE
   GUI front-end for ClamAV on Linux.
   ●●○Medium · Different UI, similar features
2. Microsoft Defender ↗
   Built-in Windows antivirus — solid baseline.
   ●●○Medium · Different UI, similar features