PuTTY

A terminal emulator to remotely access servers

Hermes EMail Server

Efficient free email server

RaidenFTPD

Incredible FTP server for Windows

Simple DNS Plus

Create your own DNS server and increase your browsing speed

ShowMyPC

Instant remote access to computers on the Internet

FileZilla Server

Powerful FTP Server that's totally free

Mercury/32

Configure an mail server on your PC

AbsoluteTelnet

Connect to another computer by Telnet or SSH

Cerberus FTP Server

Install an FTP server on your computer

Apache HTTP Server

Install a powerful web server on your computer

Active Search Engine

Install you own Web search engine on your server

ArGoSoft Mail Server

Easily install an electronic mail server on any computer

VNC

Control any computer remotely

Exchange Server 2013

The perfect solution for corporate email

UpRight

Upload files to Amazon S3

AppServ

Excellent software application to install a web server

NetSpeedMonitor

Measure your Internet speed

Cisco Packet Tracer

Find out how a network behaves

RouterPassView

Discover the router passwords that you have forgotten

Network Inventory Advisor

Control the software and hardware that connects to your networks

Fing

Scan and analyze your computer network

WinPcap

Library pack for network managers

DameWare NT Utilities

Allows network administrators to improve how they control PCs

Nmap

Easily audit your local network

Wireshark

Professional network analyzer

GFI LANguard

Check the vulnerabilities of your LAN network

Technitium MAC Address Changer

Change your network card's MAC

Hamachi

Tool to create virtual private networks

inSSIDer

Scan nearby Wi-Fi connections

WinBox

Management software for MikroTik routers

Open Ports Scanner

Stay informed about which ports are open