Recently I purchased Acer Aspire One netbook and decided that I will only install and run free and open source applications on it. So far its been great, I have found free applications to replace most of the commercially available ones, and they are very good replacements.
Here is a list of applications that I use.
AVG Free Edition – Very good anti virus, free for personal use.
Get it here
You may also want to check out Microsoft Security Essentials. I have not used it myself but have heard good things about it.
OpenOffice – Great free office suite, which includes Writer (word processing), Calc (spreadsheet), Impress (presentation), Draw (imaging) and Base (database). Get it here
Paint.NET – great image editing software. Get it here
Google Chrome – my favorite browser. Get it here
Firefox – another great browser. Get it here
Thunderbird – Email application. Get it here
VLC Media Player – One of the best media players available, haven’t come across a media file format yet that this app couldn’t play. Get it here
Winamp – another great media player that has been around since the ’90s. Get it here
7z – File archiver. Great replacement for WinZip / WinRar. Get it here
Daemon Tools Lite – great tools for creating virtual CD/DVD/BD ROM drives and mounting images. Get it here