PuTTY

A terminal emulator to remotely access servers

Mercury/32

Configure an mail server on your PC

Cerberus FTP Server

Install an FTP server on your computer

Vedivi

Control your home PC from any other computer

Netretina

Screen sharing utility to help your clients

NoMachine

Like the former NX client, but much more secure

Exchange Server 2013

The perfect solution for corporate email

AbsoluteTelnet

Connect to another computer by Telnet or SSH

FileZilla Server

Powerful FTP Server that's totally free

ShowMyPC

Instant remote access to computers on the Internet

AppServ

Excellent software application to install a web server

UpRight

Upload files to Amazon S3

VNC

Control any computer remotely

Apache HTTP Server

Install a powerful web server on your computer

Active Search Engine

Install you own Web search engine on your server

RaidenFTPD

Incredible FTP server for Windows

NI Multisim

The best software to design PCBs

Resistance Calculator

Calculate the value of a resistance according to its casing's color

SEE Electrical LT

Create electricity projects and their documentation

OrCAD

The best tool to design PCBs

Logisim

Learn everything to be known about digital circuits

KiCad

Tool for creating electrical diagrams and printed circuit boards

LabVIEW

Development environment for industrial applications

ProfiCAD

Simple tool with which you can build your electric circuits

PCB

Carry out your own electronic designs with this software

PCB Wizard

Software to design circuit boards

Proteus

Electronic circuit and microprocessor simulator

Zelscope

Have a complete oscilloscope on your desktop

Livewire

Design and simulate electronic circuits

PSpice

Very good circuit analysis software