SoftLAN is a software system (server/secondary server/client) that helps enterprises to build virtual LANs through internet. With SoftLAN, computers in different locations can communicate as if they were in an LAN by cable. SoftLAN can improve network speed between different ISPs or different regions by deploying multiple secondary servers. It use RSA and AES to encrypt data between peer-peer and peer-server. It has built-in secure chat, group-chat, and file sharing. It is very easy to use and deploy for enterprises. The SoftLAN secondary server and SoftLAN client are totally FREE, you only need pay for the SoftLAN server. The SoftLAN Server and Secondary Server also support 64bit Windows.