Adobe Digital Editions 3.0

Ever wondered how you can open eBooks with the format epub, aeh, irx etc. Well there are plenty of softwares in the market, but I am guessing that you will not get the feel of reading it as a book, but more like a pdf document. Well Adobe has found a solution for you. The software devlopment company which makes you pay for every software you download, finally releases a software where you don't have to actually pay for anything.
ADE is available for both Mac and Windows.
To download for Mac click here (16.9 MB)
To download forWindows click here (5.9 MB).

Tixati

Torrents are not even required of mentioning. But still I will write about it for rookies. Torrents are a very complicated version of your home peer-to-peer system. I won't get into the working of torrents but I'll tell you how to download one. To download a torrent you will need a bit-torrent client. Here I will be mentioning a very unfamiliar client. It's name is Tixati. 

I know most of you are using the very familiar "utorrent", but I would suggest you to use Tixati as it is faster and very light. Although the appearance maybe be rather unwelcome, you will get used to it.

Sorry Mac users, Tixati is only available for Windows and Linux.

Tixati can be downloaded from here.

7-Zip

7-Zip has quickly become the de facto leader when it comes to getting a free tool to pack and unpack compressed archives. It supports packing 7z, TAR, ZIP and other formats, and about four times as many for decompression. Throw in some AES-256 encryption and it's a great security tool, too. This software comfortably works on both Mac and Windows

You can download this software from here.

Microsoft Mathematics 4.0

This freebie is aimed mainly at maths and science students, but will appeal to anyone who has need for a graphing calculator with 2D and 3D plotting capabilities as well as step-by-step equation solving. You'll find a formulas and equations library with over 100 commonly used entries, a triangle solver for those wanting to brush up on their sines, cosines and tangents, plus a handy conversion tool covering most measurable units.

Rapid Typing 5

Ever felt the need to be able to type faster and more accurately and could not afford for typing classes. For those of you who face this problem there is an application for this very purpose. Rapid Typing 5 allows you to learn typing step by step in a very easy and friendly way. It is absolutely free (obviously!) and rather light too. Just practicing it once a day for one month can change your typing speed drastically.
Rapid Typing 5 works on Windows, Mac OS and also Linux. You can download it from the following links.
Download Setup
Download Zip Package

Emulation

Ever had that nostalgic feeling of wanting to play Nintendo DS or Game boy but find it hard to make up your mind to run down to the store and actually buy one. Since this is not possible for all of us, I have a solution for you. Its called emulation. Emulation actually allows you to play the games which are only available on gaming devices such as Game Boy or Nintendo DS to be played on your computer. Sounds cool right. And it is also very easy. Here are step by step instructions to do so. These emulators are available for both Mac OS and Windows.

Game Boy

1. Download the Visual Boy Advanced emulator from http://www.emulator-zone.com/files/emulators/gba/vboyadvance/VisualBoyAdvance-1.8.0-beta3.zip.
2. After download is complete extract the contents.
3. Keeping that aside now download the Roms of requires games from http://coolrom.com/
4. After installation open the rom files using the emulator by File -> Open.
5. Play the games usng the basic cursor controls and z, x, a, s

Nintendo

1. Download the DeSuME emulator from http://desmume.org/download/
2. After download is complete extract the contents.
3. Keeping that aside now download the Roms of requires games from http://coolrom.com/
4. After installation open the rom files using the emulator by File -> Open.
5. Play the games using the basic cursor controls and z, x, a, s.

Please note that these emulators are not only applicable for NDS and Game Boy but it is applicable for most of all the gaming consoles. 

Lightworks

Everyone wants to edit their videos for Youtube today. But all the video editors available in the market are rather costly and not easily available. If you face these problems, then Lightworks is the right application for you. Lightworks is a professional free and is available at http://www.lwks.com/ The only drawback is that you need to create a free account in the website to download it. But excluding that it is a pretty neat application (considering the things you do to get a paid application for free and in turn ripping software companies off).
Lightworks is available for Windows and Linux and will soon be available to Mac OS.