Reference Links

Open Source/Free Software Reference Guide

All Common Downloads
Ninite

Firewall/VPN/DHCP/Load Balancer
PFSENSE

Email Servers
HMail Servers
Mail Enable
Postfix
Sendmail
QMail
Mail Server Comparison Guide

Hosted Email Solutions
Google Apps Standard

Email Clients
Mozilla ThunderBird
IncrediMail

Spam Filter
Boxbee

Download Manager
Free Download Manager

PDF Reader/Writer
Adobe PDF Reader
Cute PDF Writer

Office Suites
Open Office

Virtual Machines
VMware Server
VMware Player
Zen Server
Cent OS
Ubuntu Server

Linux
Ubuntu Workstation

PBX Phone System
Digium Switchvox
SJ Softphone
Asterisks

Web Application
Railo (Cold Fusion Markup Language)

Web Servers
Apache
Xampp

Database Programs
MySQL
SQL Express/Visual Studio Express

Antivirus/Anti Malware Programs
Dr Web Live CD
Malwarebytes
Microsoft Security Essentials
AVG Antivirus
Avast Antivirus