I always wanted free software for recording all screen and audio activity for making video clips so that I can perform different works in smart way with great zeal and fun.

You can use it for different purpose like demonstrating videos for any software program, creating video tutorials for school or college classes, creating video based information products for selling purpose, recording of new tricks and techniques discovered by you on your favorites software program, creating a set of videos to solve question mostly asked by users etc.

Cam studio is completely free your personal and commercial project without any limitation.

» Read more: Free open source software CamStudio for Capturing screen activity

Now it has become very easy to create technical diagram for electrical engineer, a computer programmer and for network administrator. Using Dia people can draw UML diagram, network maps, entity relationship diagrams and flowcharts. New shapes can also be created by writing simple XML files, using a subset of SVG to draw the shape. Creating diagram using Dia is more flexible and free from hassle. An electrical engineer use Dia to create a diagram showing how their circuit works. A computer programmer may use Dia to create a flowchart to show the execution path o their programs and a network administrator shows the execution path of their program through diagrams created by Dia.
» Read more: Easy creation of technical diagrams with Dia