Alternatives to Avast Security

Antivirus software

Security including web and email protection

Scan and remove malware, spyware, and viruses

Stand alone ad blocker

Anti-virus and malware scanner

Disk encryption software focusing on security based on TrueCrypt

Protect your personal files

VPN client focusing on security

VPN for privacy and security

Host-based application firewall

Open-source BitTorrent client

Tools to protect your emails and files