Use free software !!!
OpenOffice.org –OpenOffice.org (OO.o or OOo) is an office application suite available for a number of different computer operating systems. It supports the ISO standard OpenDocument Format (ODF) for data interchange as its default file format, as well as Microsoft Office ’97-2007 formats, among many others.
FireFox –Mozilla Firefox is a web browser descended from the Mozilla Application Suite, managed by the Mozilla Corporation.Firefox includes tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and an integrated search system that uses the user’s desired search engine. Functions can be added through around 2,000 add-ons created by third party developers; the most popular include NoScript (script blocker), Adblock Plus (ad blocker), StumbleUpon (website discovery), DownThemAll! (download functions) and Web Developer (web tools).
µTorrent –µTorrent (also microTorrent or uTorrent) is a freeware, closed source, BitTorrent client for Microsoft Windows written in C++ and localized for many different languages. It is designed to use minimal computer resources while offering functionality comparable to larger BitTorrent clients such as Azureus or BitComet.
PeerGuardian 2 –PeerGuardian and PeerGuardian 2 are free and open source programs developed by Phoenix Labs. They are capable of blocking incoming and outgoing connections based on IP blocklists. The system is also capable of blocking advertising, spyware, government and educational ranges, depending upon user preferences.
DC++ –DC++ is a free and open-source, peer-to-peer file-sharing client that can be used to connect to the Direct Connect network or to the ADC protocol. It is developed primarily by Jacek Sieka, nicknamed arnetheduck.As of 2008, DC++ had around 90% market share of the Direct Connect community.
TrueCrypt –TrueCrypt is a software application used for on-the-fly encryption (OTFE). It can create a „file-hosted container“ or write a partition which consists of an encrypted volume with its own file system, contained within a regular file, which can then be mounted as if it were a real disk. TrueCrypt also supports device-hosted volumes, which can be created on either an individual partition or an entire disk. With version 5.0 it can now encrypt the Windows boot partition. It is distributed under a collection of licenses, including the TrueCrypt License, which, although criticised, is judged by Debian to be a free software licence. TrueCrypt is available for Microsoft Windows, Mac OS X, and Linux.