Compression:
- Ark: Displaying, decompression (Linux)
- Bzip2: Compression (Linux, Mac, Win)
- Cryptmount: Encrypt Files (Linux)
- File Roller: Archive Manager (Linux)
- Gzip: Compression (Linux, Mac, Win)
- PeaZip: Free Archiver (Linux, Mac, Win)
- Unarchiver: Compression (Mac)
- 7-Zip File-Compression (Win)
- 7 Best Compression Tools (Linux, Mac, Win)
Internet Encryption:
- EnigMail: Email Security (Linux, Mac, Win)
- Mailvelope: Browser (Linux, Mac, Win)
- Mymail-Crypt for Gmail (Linux, Mac, Win)
- Tor: Browser, Anonimity (Linux, Mac, Win)
- TorBirdy: Email & Tor (Linux, Mac, Win)
- Whispers, TextSecure, (Linux)
Password Managers:
- Bitwarden (Linux, Mac, Win)
- Buttercup (Linux, Mac, Win)
- Encryptr (Linux, Mac, Win)
- Gopass (Linux, Mac)
- Keepass (Linux, Mac, Win)
- KeePassX & KeePassXC (Linux, Mac, Win)
- Keeweb (Linux, Mac, Win)
- KWalleteManager (Linux)
- MacPass (Mac)
- Pass (Unix)
- Passbolt (Linux, Mac, Win)
- PasswordGorilla (Linux, Mac, Win)
- Proton Pass (Linux, Mac, Win)
- QtPass (Linux, Mac, Win, Unix)
- UPM (Linux, Mac, Win)
- Seahorse (Linux)
Security & Anti-Virus:
- Amavis: Mail Scanner (Linux, Mac, Win)
- Axcript: Encryption (Win)
- AVG: Anti-Virus (Linux, Win)
- BoxCryptor: Cloud Storage (Win)
- Brutelock: Stop Attackers (Linux)
- Chkrootkit: System Integrity (Linux)
- ClamAV (Linux, Mac, Win)
- ClamWin AntiVirus (Win)
- ClamTK (Linux)
- Collax: Network Security (Linux)
- Cryptmount: Encrypted Files (Linux)
- DansGuardian: WebFilter (Linux, Mac)
- DenyHosts: Security (Linux, Mac)
- Endian: Firewall Community (Linux)
- Firestarter Firewall (Linux)
- GnuPG: Privacy Guard (Linux, Mac, Win)
- Gpg4win: Security Desktop (Win
- Idemix: Identity Security (Linux, Win)
- IPFilter: TCP/IP Firewall (Linux)
- John The Ripper: Passwd Cracker (Linux, Mac)
- Kismet: Wireless Detector (Linux, Mac, Win)
- Linux Security Tools: Top 100 (Linux, Mac, Win)
- Malwarebytes: Anti-Virus (Mac, Win)
- Mail Scanner: Anti-Virus (Linux)
- MacFure: 3rd-Party Systems (Mac)
- MacTrash: Clean it (Mac)
- Moblock: Block Connections (Linux)
- Nagios: Virus for Enterprise (Linux, Win)
- Nessus Virus scanner (Linux, Mac, Win)
- Nmap: Network Scanner (Linux, Mac,Win)
- NuFW: Firewall (Linux)
- OpenDNS: Secure Network (Linux, Mac, Win)
- OpenSSL: Secure Sockets (Linux)
- OpenSSH: Connect (Linux, Mac, Win)
- OpenVas Nessus Fork (Linux, Mac, Win)
Security (Cont.)
- OSSEC: Intrusion Detectionstem (Linux, Win)
- P3Scan (Linux)
- Prey: Anti Theft (Linux, Mac, Win)
- Proxmox: Anti Spam (Linux)
- Putty: Telnet/SSH Client (Linux)
- RFXN: Networks, Firewall (Linux)
- RKHunter: Malware Scan (Linux)
- Sardu: Antivirus Rescue Utility (Linux, Win)
- Seahorse: Encryption Made Easy (Linux)
- Security: Best80 Programs (Linux, Mac, Win)
- SmoothWall Firewall (Linux)
- Snort: Intrution Prevention (Linux, Win)
- SpamAssassin (Linux, Mac, Win)
- SpiderOak: (Linux, Mac, Win)
- Spybot Search & Destroy (Win)
- TCPDUMP Network Debugging (Linux)
- Viralator: Anti-virus (Linux)
- Virus: Anti-virus (Linux, Mac, Win)
- Vuurmuur: Firewall (Linux, Mac, Win)
- Wicd Encryption (Linux, Win)
- WireShark: Packet Sniffer (Linux, Mac, Win)
- Zfone: Email Encrypt (Linux, Mac, Win)
- Zoneminder: Home Surveillance (Linux)
- 13 Best Anit-Malware tools (Linux, Mac, Win)
- 5 Best Content Filtering Tools (Linux)
- 40 Tools for Privacy (Linux, Mac, Win)
- 80 Bes Security Apps (Linux, Mac, Win)