Check Point Firewall Software Blade - Check Point delivers the best security solutions withthe right architecture to prevent attacks in allof yourenvironments.

GPGTools - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.

pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more

Pignus Encryption - Pignus Encryption is an encryption platform that allows users to encrypt their messages and documents.

ClearOS - A very good alternative for Windows Server, for free

DeliverySlip - DeliverySlip helps simplify, secure, and expedite the burdensome elements of online collaboration...