OpenDNS provides a safer, faster and smarter DNS service that is free, with no software to install.

KeePass is an open-source password safe. Passwords can be stored in highly-encrypted databases, that can be unlocked with one master key or key-disk.

Promoting education and health in online security and privacy.

Very fast and small ip scanner, port scanner, and network scanner in one, helpful for analyzing networks and scanning ports

Fast multi-threaded IPv4/IPv6 scanner with an extensive range of options and advanced features for system administrators and general users.

Unique collection of freeware desktop utilities, system utilities, password recovery tools, components, and free source code examples

Nmap Free Security Scanner For Network Exploration & Hacking. Download open source software for Redhat Linux,Microsoft Windows,UNIX,FreeBSD,etc.