Você está precisando de um programa grátis, tipo um sistema operacional como Linux, mas não tem como pagar? Um bom programa não precisa necessariamente ser pago, para ser bom, aqui tem uma lista de 276 programas livres para você deitar e rolar. Todos são FREEWARE.
3D Graphics:

3Delight Free - http://www.3delight.com/index.htm

Anim8or - http://www.anim8or.com/

Aqsis - http://www.aqsis.com/

Blender - http://www.blender3d.org/

gmax - http://www.discreet.com/products/gmax/

Houdini (Free Edition) - http://www.sidefx.com/apprentice/index.html

Maya Personal Learning Ed. - http://www.alias.com/eng/products-se…maya_ple.shtml

Now3D - http://digilander.libero.it/giulios/Eng/homepage.htm

OpenFX - http://www.openfx.org

SOFTIMAGE|XSI EXP - http://www.softimage.com/products/exp/v3/

Terragen - http://www.planetside.co.uk/terragen/

Toxic - http://www.toxicengine.org/

Wings 3D - http://www.wings3d.com/

Anti-Virus:

AntiVir - http://www.free-av.com/

Avast - http://www.avast.com/i_idt_1018.html

AVG - http://www.grisoft.com/

ClamWin - http://www.clamwin.com/

Anti Spyware:

Ad-aware - http://www.lavasoft.de/software/adaware/

Bazooka - http://www.kephyr.com/spywarescanner/index.html

Diet K - http://www.dietk.com/

SpyBot Search & Destroy - http://spybot.safer-networking.de/

SpywareBlaster - http://www.javacoolsoftware.com/spywareblaster.html

SpywareGuard - http://www.wilderssecurity.net/spywareguard.html

WinPatrol - http://www.winpatrol.com/

IRC Clients:

BersIRC - http://www.bersirc.com/

BitchX - http://bitchx.org/download.php

HydraIRC - http://www.hydrairc.com/

TinyIRC - http://www.tinyirc.net/

XChat - http://www.silverex.org/news/

Audio Players:

1by1 - http://www.rz.uni-frankfurt.de/~pesch

Billy - http://www.sheepfriends.com/?page=billy

CoolPlayer - http://coolplayer.sourceforge.net/

DeliPlayer. http://www.deliplayer.com/

Foobar 2000 - http://www.foobar2000.org/

iTunes - http://www.apple.com/itunes/

Jet Audio Basic - http://www.jetaudio.com/

Musik - http://musik.berlios.de/

QCD Player - http://www.quinnware.com/

Sonique - http://sonique.lycos.com/

Winamp - http://www.winamp.com/

XMPlay - http://www.un4seen.com/xmplay.html

Audio Tools:

Audacity - http://audacity.sourceforge.net/

CDex - http://cdexos.sourceforge.net/

dBpowerAMP Music Converter - http://www.dbpoweramp.com/dmc.htm

EAC - http://www.exactaudiocopy.de/

Encounter 2003 - http://www.waschbusch.com/

GermaniXEncoder - http://www.germanixsoft.de/

K-MP3 - http://www.katarncorp.com/

KraMixer - http://www.kramware.com/

MP3 Book Helper - http://mp3bookhelper.sourceforge.net/

MP3 Tag - http://www.mp3tag.de/

mp3DirectCut - http://www.rz.uni-frankfurt.de/~pesch/

MP3Gain - http://www.geocities.com/mp3gain/

mp3Trim - http://www.logiccell.com/~mp3trim/

MusicBrainz - http://musicbrainz.org/

Rarewares - http://rarewares.hydrogenaudio.org/

SoundEngine Free - http://www.cycleof5th.com/en/index.htm

TagScanner - http://xdev.narod.ru/tagscan_e.htm

The GodFather - http://users.otenet.gr/~jtcliper/tgf/

CD/DVD Burning:

Burn4Free - http://www.burn4free.com/

Burnatonce - http://www.burnatonce.com/

CDBurnerXP - http://hem.bredband.net/cdburnerxp/

CDRDAO - http://cdrdao.sourceforge.net/

CDR Tools Frontend - http://demosten.com/cdrfe/

Deepburner - http://www.deepburner.com/

DVD Decrypter: http://www.dvddecrypter.com/

Easy Burning, DropCD & Audio CD - http://www.paehl.de/cdr

Compression / Decompression:

7-zip - http://www.7-zip.org/

bzip2 - http://sources.redhat.com/bzip2/index.html

ExtractNow - http://www.extractnow.com/

FilZip - http://www.filzip.com/

IZArc - http://www.florida.plus.com/izarc/

QuickZip - http://www.quickzip.org/

TUGZip - http://www.tugzip.com/

UPX - http://upx.sourceforge.net/

Zip&Go - http://www.handybits.com/zipngo.htm

Zipgenius - http://www.zipgenius.it/

Defrag Software:

DIRMS & Buzzsaw - http://www.dirms.com/

OpenVMS - http://www.execsoft.com/freeware/freeware.asp

Desktop Enhancements:

AveDesk - http://www.aqua-soft.org/board/showthread.php?t=17372

CursorXP - http://www.stardock.com/products/cursorxp/download.html

Kapsules - http://kapsules.shellscape.org/

MobyDock - http://www.mobydock.com/

Panorama - http://www.ivory.org/panorama.html

Rainlendar - http://www.ipi.fi/~rainy/index.php?p…ect=rainlendar

Samurize - http://www.samurize.com/

tclock2 - http://home.inreach.com/2tone/tclock2/tclock2.htm

Weather Watcher - http://www.singerscreations.com/

Download managers:

Free Download Manager - http://www.freedownloadmanager.org/

Fresh Download - http://www.freshdevices.com/freshdown.html

Star Downloader - http://www.stardownloader.com/downloads.php

wackget - http://millweed.com/projects/wackget/

wget - http://xoomer.virgilio.it/hherold/

Encryption and data security:

Axcrypt - http://axcrypt.sourceforge.net/

Blowfish Advanced CS- http://web.bsn.ch/lasse/bfacs.htm

Eraser - http://www.heidi.ie/eraser/default.php

File Shredder - http://www.sys-shield.com/fileshredder.htm

KeePass - http://keepass.sourceforge.net/

GnuPG - http://www.gnupg.org/

PGP Freeware - http://www.pgp.com/products/freeware.html

WindowsCleaner - http://www.winnowsoft.com/internet-eraser.htm

File Managers:

2xExplorer - http://netez.com/2xExplorer/

A43 - http://www.shawneelink.net/~bgmiller/

ExplorerXP - http://www.explorerxp.com

Gyula’s Navigator - http://www.wanari.com/

JExplorer - http://home.megapass.co.kr/~woosjung/

MeeSoft Commander - http://meesoft.logicnet.dk/

File repair and recovery:

PC Inspector File Recovery - http://www.pcinspector.de/file_recovery/UK/welcome.htm

Firewalls:

Kerio (Kerio Personal Firewall is FREE for home and personal use) - http://www.kerio.com/kpf_home.html

Outpost Firewall (version 1 is free) - http://www.agnitum.com/download/outpost1.html

Sygate (FREE for personal use) - http://smb.sygate.com/products/spf_standard.htm

Zonealarm Basic firewall - http://www.zonelabs.com/store/conten…eeDownload.jsp

FTP Clients:

CoreFTP - http://www.coreftp.com/

Filezilla - http://sourceforge.net/projects/filezilla

miFiles - http://www.simdata.com.au/mifiles.html

SmartFTP - http://www.smartftp.com/

FTP Servers:

FileZilla - http://filezilla.sourceforge.net/

Golden FTP Server - http://www.goldenftpserver.com

GuildFTPD - http://www.totalshareware.com/asp/de…plication=8334

Quick ‘n Easy FTP Server - http://www.pablovandermeer.nl/ftp_server.html

SlimFTPd - http://www.whitsoftdev.com/slimftpd

WarFTPD - http://www.jgaa.com/

HTML Editors:

1st page 2000 - http://www.evrsoft.com/download.shtml

AceHTML - http://freeware.acehtml.com/download.html

Aracnophilia - http://www.arachnoid.com/arachnophilia/

HTML-Kit - http://www.chami.com/html-kit/

NVU - http://www.nvu.com/index.html

Selida - http://www.amaryllis.8m.com/

Trellian webPAGE - http://webpage.vendercom.com/

TSW WebCoder - http://www.tsware.net/

Image viewers:

Ahaview - http://www.aha-soft.com/ahaview/ahaviewfree.exe

Irfanview - http://www.irfanview.com/

Picasa - http://www.picasa.com/content/download.php

SlowView - http://www.slowview.at/

XNView - http://www.xnview.com/

Instant Messenger:

Gaim - http://gaim.sourceforge.net/

IM2: http://www.im2.com

Miranda IM - http://www.miranda-im.org/

Pandion - http://www.pandion.be/

PSI - http://psi.affinix.com/

SIM - http://sim-icq.sourceforge.net/

Trillian Basic - http://trillian.cc/downloads

Internet Explorer Front-Ends:

Avantbrowser - http://www.avantbrowser.com/

Maxthon - http://www.maxthon.com/

SlimBrowser - http://www.flashpeak.com/sbrowser/sbrowser.htm

Mail programs:

Foxmail - http://fox.foxmail.com.cn/english/

i.Scribe - http://www.memecode.com/

Mahogany Mail - http://mahogany.sourceforge.net/

Pegasus Mail - http://www.pmail.com/

PopTray - http://www.poptray.org/

Thunderbird - http://www.mozilla.org/projects/thunderbird/

Anti-spam programs:

K9 - http://www.keir.net/k9.html

MailWasher- http://www.mailwasher.net/

POPFile - http://popfile.sourceforge.net/

SpamBayes - http://spambayes.sourceforge.net/

Network Tools:

CMDTime NTP Utility - http://www.softshape.com/download/

Ethereal Protocol Analyzer - http://www.ethereal.com/

NetMeter - http://readerror.gmxhome.de/

NetProfiles - http://netprofiles.danielmilner.com/

NMap - http://www.insecure.org/nmap/

Ntop - http://www.ntop.org

PingPlotter - http://www.pingplotter.com

PuTTY - http://www.chiark.greenend.org.uk/~sgtatham/putty

RAS Graph & Stats - http://forum.flashfxp.com/showthread…&threadid=2400

RealVNC - http://www.realvnc.com/

TightVNC - http://www.tightvnc.org/

UltraVNC - http://ultravnc.sourceforge.net/

WinSCP - http://www.winscp.com/

Office Suite:

602PC Suite free edition - http://www.software602.com/products/pcs/download.html

AbiWord - http://www.abiword.com/

OpenOffice.org - http://www.openoffice.org/

Partition Managers:

Partition Resizer - http://zeleps.com/

Ranish Partition Manager - http://www.ranish.com/part/

TestDisk - http://www.cgsecurity.org/index.html?testdisk.html

PDF Utilities:

Free PDF - http://www.webxd.com/zipguy/frpdfdl.htm

Ghostscript/GSView - http://www.ghostscript.com/

PDF 995 - http://www.pdf995.com/

PDFCreator - http://sourceforge.net/projects/pdfcreator/

PrimoPDF - http://www.primopdf.com/

Photo manipulation and image design:

ColorPic - http://www.iconico.com/colorpic/

Paint .NET - http://www.eecs.wsu.edu/paint.net/

Pixia - http://www.ab.wakwak.com/~knight/

Pixie - http://www.nattyware.com/pixie.html

PhotoFiltre - http://www.photofiltre.com/

Sodiodi - http://www.sodipodi.com/

The Gimp - http://www.gimp.org/

Tuxpaint - http://www.newbreedsoftware.com/tuxpaint

Programming:

ActivePerl - http://www.activestate.com/Products/ActivePerl

Crimson Editor - http://www.crimsoneditor.com/

Context - http://www.context.cx/

Dev C++ - http://www.bloodshed.net/

Dev Pascal - http://www.bloodshed.net/

Digital Mars C++ - http://www.digitalmars.com/download/freecompiler.html

Eclipse - http://www.eclipse.org/

ExamDiff - http://www.prestosoft.com/ps.asp?page=edp_examdiff

Freepascal - http://www.freepascal.org/

JCreator LE - http://www.jcreator.com/download.htm

jEdit - http://www.jedit.org/

Notepad++ - http://notepad-plus.sourceforge.net/uk/site.htm

Notepad2 - http://www.flos-freeware.ch/

Pelles C - http://www.smorgasbordet.com/pellesc/index.htm

PHP Hypertext Parser - http://www.php.net/

PSPad - http://www.pspad.com/

Python - http://www.python.org/

Ruby - http://www.dm4lab.to/~usa/ruby/index_en.html

SharpDevelop - http://www.icsharpcode.net/opensource/sd/

Pop-up Blockers:

Google Toolbar - http://www.google.com/

NoAds - http://www.southbaypc.com/NoAds/

PopUp Stopper - http://www.panicware.com/product_psfree.html

Privoxy - http://www.privoxy.org/

Proxomitron - http://www.proxomitron.info/

RSS Readers:

Ablion - http://www.fileheaven.com/Abilon/download/14059.htm

RSSOwl - http://www.rssowl.org/

System Information and monitoring:

CPU-Z - http://www.cpuid.com/cpuz.php

Everest - http://www.lavalys.com/products/over…ng=en&pageid=1

Gkrellm - http://bill.nalens.com/

Motherboard monitor - http://www.majorgeeks.com/download.php?det=311

SpeedFan - http://www.almico.com/speedfan.php

Sysmetrix - http://www.xymantix.com

WCPUID - http://hp.vector.co.jp/authors/VA002…/download.html

Video codecs :

DivX Codec - http://www.divx.com/divx/?src=toptab…rom_/index.php

FFDSHOW - http://sourceforge.net/projects/ffdshow

XviD - http://www.xvid.org/

Video players :

BsPlayer - http://www.bsplayer.org/

Crystal Player - http://www.crystalplayer.com/index.php?page=downloads

Cygwin MPlayer - http://armory.nicewarrior.org/projects/cygmp/

DivX Player - http://www.divx.com/

MaximusDVD - http://www.maximusdvd.com/

Media Player Classic - http://sourceforge.net/project/showf…group_id=82303

VideoLan - http://www.videolan.org/

Video tools:

DVD Shrink - http://www.dvdshrink.org/

DScaler - http://deinterlace.sourceforge.net/

FlasKMPEG - http://www.flaskmpeg.net

GSpot - http://www.headbands.com/gspot/

VirtualDub - http://www.virtualdub.org/

VirtualDubMod - http://sourceforge.net/project/showf…group_id=65889

Zwei-Stein Video Editor - http://www.thugsatbay.com/software/index.html

Web browsers:

Firefox - http://www.getfirefox.com

K-Meleon - http://kmeleon.sourceforge.net/

Mozilla - http://www.mozilla.org/

Netscape - http://channels.netscape.com/ns/browsers/default.jsp

Web servers:

Abyss - http://abyss.sourceforge.net/

Apache - http://httpd.apache.org/

Sambar - http://www.sambar.com/

Savant - http://savant.sourceforge.net/

SimpleServer:WWW - http://www.analogx.com/contents/down…work/sswww.htm

TinyWeb - http://www.ritlabs.com/tinyweb/index.html

Webcam Software:

booruWebCam - http://www.booru.net/

Pryme - http://www.hilo.dk/pryme/

Checksum Utilities:

fsum - http://www.slavasoft.com/fsum/

hksfv - http://www.big-o-software.com/products/hksfv/

md5sum - http://www.etree.org/md5com.html

md5summer - http://www.md5summer.org/

General Utilities And Other Applications:

AnalogX - http://www.analogx.com/

AppRocket - http://www.candylabs.com/approcket/

Celestia - http://www.shatters.net/celestia

CCleaner - http://www.ccleaner.com

Cygwin - http://www.cygwin.com

Dirkey - http://www.protonfx.com/dirkey/

EditPad Lite - http://www.editpadpro.com/editpadlite.html

HTTrack - http://www.httrack.com/

Inno Setup - http://www.jrsoftware.org/isinfo.php

Memtest-86 - http://www.memtest86.com

MWSnap - http://www.mirekw.com/winfreeware/mwsnap.html

NetTime - http://nettime.sourceforge.net

Nullsoft Installer - http://www.nullsoft.com/free/nsis

Peerguardian - http://xs.tech.nu/

QuickSFV - http://www.geocities.com/SiliconValley/Mouse/4668/

png2ico - http://winterdrache.de/freeware/png2ico

Stickies - http://finiteloop.org/~btaylor/software/stickies/

Sysinternals - http://www.sysinternals.com/

Toolbox - http://www.sil.org/computing/toolbox/

TuneXP - http://www.driverheaven.net/dforce/s…?doc=txp_about

Turbo Pad - http://turbopad.sourceforge.net/

Vim - http://vim.sourceforge.net

Fonte: www.techzonept.com