First off, a shout out to Ninite, a software you can use to install popular software easily and quickly, without annoying next, next, next prompts and unwanted software.

If you are looking to install some software on your computer, here is a compiled list of (almost) everything you need.

Browsers, video, audio and communication
Browsers :

Google Chrome

Firefox

Video :

VLC : Simple, fast and powerful media player.

MPC-HC  : Light-weight media player for Windows. I would recommend MPC-HC over VLC.

Audio :

Spotify : A digital music service that gives you access to millions of songs.

Foobar 2000 : Media player with simple UI and low memory use. Supports a wide array of different audio formats.

Audacity : Audio editor for recording, slicing, and mixing audio.

Communication :

Skype : Make internet calls for free with Skype.  Discover a whole new world of staying in touch.

TeamViewer : A software package for remote control, desktop sharing, online meetings, web conferencing and file transfer between computers.

Security, system, cleaning and recovery
Security :

Microsoft Security Essentials : Free spyware protection that helps protect you against viruses, spyware, and other malicious software. « It’s like a ninja : you don’t see it, you don’t feel it, but when you do it does its job quickly and melds back to the shadows. ».

MalwareBytes : Detect and remove all traces of malware.

Prey : Proven tracking software that helps you find, lock and recover your device when stolen or missing.

TrueCrypt :  A free open-source disk encryption software for Windows 7/Vista/XP, Mac OS X and Linux.

Lastpass : An online password manager and form filler that makes web browsing easier and more secure.

Keepass : An open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password.

 

System, cleaning and recovery :

CCleaner : Freeware system optimisation and cleaning tool that erases Internet history and other unused files, and cleans up orphaned registry entries.

Tune Up : TuneUp Utilities 2013 boosts PC speed, repairs registry, and extends battery life.

Deffragler : Use Defraggler to defrag your entire hard drive, or individual files.

Recuva : Recuva recovers files deleted from your Windows computer, Recycle Bin, digital camera card, or MP3 player.

Speccy : Speccy is an advanced System Information tool for your PC. Need to find out what’s inside your computer? No problem.

Ma config : Détecte la configuration de l’ordinateur et trouve les pilotes adaptés.

Mes Drivers : Détection en ligne automatique de la configuration matérielle et des drivers compatibles.

Documents, books, images, graphics and file sharing
Documents, books, images and graphics :

Calibre eBook : Calibre provides all the elements you need to organize and manage an e-book collection.

Libre Office : A free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux.

Open Office : The free and open productivity suite. I would recommend Libre Office over Open Office.

Notepad : A free source code editor which supports several programming languages running under the MS Windows environment.

Sublime Text : A sophisticated text editor for code, markup and prose. You’ll love the slick user interface, extraordinary features and amazing performance.

Paint.NET : A free image and photo editing software for computers that run Windows.

Blender :  The open source, cross platform suite of tools for 3D creation.

FDF Text Extractor : Export your annotations as a data file using Adobe Reader, and then drag and drop the FDF onto FDF Text Extractor. A plain text file with your annotations will pop out, ready to be pasted into your reference manager. All text-containing annotation types are supported.

Sumatra PDF : A PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows.

PDF xChange Viewer : The PDF-XChange Viewer is smaller, faster and more feature rich than any other free PDF Reader/ PDF Viewer/ PDF Editor available.

 

File Sharing :

Drop Box : Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again.

Google Drive : A free service that lets you store all your files including documents, photos, videos and Google Docs online and access them anywhere.

BitTorrent : A fast and easy P2P client for Windows and Mac.

uTorrent 2.2.1 : A lightweight and efficient BitTorrent client for Windows or Mac with many features. This version is the best.

Deluge : Open source, cross-platform BitTorrent client.

qBittorrent : Free software released under the GNU GPL license.

CD/DVD/Blu-Ray tools

ImgBurn : A lightweight CD / DVD / HD DVD / Blu-ray burning application

DAEMON Tools Lite : One of the best optical media emulation in the industry.

Ri4m : Logiciel gratuit pour encoder et convertir les vidéos.

Subtitle Workshop : The most complete, efficient and convenient freeware subtitle editing tool.

General

F.lux : A free software that warms up your computer display at night, to match your indoor lighting.

7zip : Open source Windows utility for manipulating archives. I would recommend 7zip over Winrar.

Winrar : A Windows data compression tool.

Rainmeter : Desktop Customization Tool.

Steam : Delivers a range of games straight to a computer’s desktop. Includes automatic updates, lists of games and prices, posters, plus access to a large gaming community.

VisualBoy Advance : a Gameboy/GBA emulator for Windows.

Surf Anonymous Free : SAF functions as changing your real IP address and identity while browsing the web via delivering users fresh anonymous proxy servers.

xMarks : Offers bookmark synchronization, search enhancement and web discovery based on sites bookmarked by users.

Tor : A system enabling its users to communicate anonymously on the Internet.

RocketDock : A smoothly animated, alpha blended application launcher. It provides a nice clean interface to drop shortcuts on for easy access and organization.

Stellarium : A free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.