Is there any software that you find must have? Let me know. But here's the deal no freeware if there is any open source project that does over all the same thing. So that would mean... no Winamp guys.
Also, try Ubuntu Linux some time. It has such a huge world of open source / free software for it. There is a good handful of software packages for linux that you can't get for windows that makes me say.... dang.... that's to bad for you guys, this software rules.
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Emulators:
FCEUX - Regular Nintendo Emulator
http://fceux.com/web/htdocs/download.php
Stella - Atari 2600 Emulator
http://stella.sourceforge.net/downloads.php
Visual Boy Advance - Gameboy Emulator
http://vba.ngemu.com/downloads.shtml
ZSNES - Super Nintendo Emulator
http://www.zsnes.com/index.php?page=files
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Games:
Chromium BSU - Top down shooter
http://www.reptilelabour.com/software/chromium/download.htm
Crack Attack - based on the Super Nintendo classic Tetris Attack
http://aluminumangel.org/attack/dl_ii_windows.html
Falling Block Game - Tetris Clone
http://sourceforge.net/projects/fbg/files/
Frets On Fire - Guitar Hero Clone using a USB Guitar or your Keyboard
http://fretsonfire.sourceforge.net/
GNU Backgammon - Backgammon
http://www.gnubg.org/index.php?itemid=56
lbreakout 2 - Breakout
http://lgames.sourceforge.net/downloads.php
Nexuiz - First person shooter with bot, lan and net play.
http://www.alientrap.org/nexuiz/
Pingus - Lemmings-like game
http://pingus.seul.org/download.html
PySolitaire - a collection of more than 300 solitaire and Mahjongg games. (Requires Python)
http://pygames.sourceforge.net/
Rise of The Block Attack - Tetris Attack clone
http://blockattack.sourceforge.net/downloads.htm
Sauerbraten - First Person Shooter with bot, lan and net play. ( my favorate open source shooter. )
http://www.cubeengine.com/files.php4
Secret Maryo Chronicles - 2D Mario like Side Scroller
http://www.secretmaryo.org/index.php?page=game_downloads&sid=?sid=3edab7e5132f19250a28c87c6b50f661
Stacker Blocks 3D - Tetris clone with 3D / OpenGL.
http://stacker-blocks.sourceforge.net/#download
Tremulous - First Person Shooter with bot, lan and net play.
http://tremulous.net/files/
Jooleem - simple yet extremely addictive puzzle game.
http://jooleem.sourceforge.net/#Downloads
LBreakout2 - Breakout clone.
http://lgames.sourceforge.net/index.php?project=LBreakout2
Mines-Perfect - Improved minesweeper-clone.
http://sourceforge.net/projects/mines-perfect/
PokerTH - Texas Hold-Em style poker game. Computer-generated or net play.
http://www.pokerth.net/download
Sudoku Portable - Sudoku.
http://portableapps.com/apps/games/sudoku_portable
Warzone 2100 - Single or online multiplayer real-time strategy game.
http://wz2100.net/download
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Google Software:
Chrome
http://www.google.com/chrome/index.html?hl=en&brand=CHMA&utm_campaign=en&utm_source=en-ha-na-us-bk&utm_medium=ha
Google Earth
http://earth.google.com/#utm_campaign=en&utm_medium=ha&utm_source=en-ha-na-us-bk-eargen&utm_term=googleearth
Google SketchUP:
http://sketchup.google.com/download/
Google Talk:
http://www.google.com/talk/
Picasa:
http://picasa.google.com
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Internet Software:
Pidgin - Multi Network IM client
http://www.pidgin.im/download/
Skype - IM, Voice chat, Video Chat, PC to Phone calls.
http://www.skype.com/download/
FrostWire - Easy Peer to Peer File Sharing.
http://www.frostwire.com/?id=downloads
PeerGuardian - IP Blacklist blocking for File Sharing.
http://phoenixlabs.org/pg2/
µTorrent - Bit Torrent Downloading Program
http://www.utorrent.com/
Adobe Flash Player
http://get.adobe.com/flashplayer/otherversions/
FileZilla - FTP Client.
http://filezilla-project.org/download.php?type=client
Fire Fox - Web Browser. If you haven't already, ditch Internet Explore.
http://www.mozilla.com/en-US/firefox/firefox.html?from=getfirefox
Java Runtime Environment
http://www.java.com/en/download/index.jsp
RSSOwl - RSS feed reader
http://www.rssowl.org/download
Thunderbird - Email Client for those not using Gmail, Althought it works well with gmail as well.
http://www.mozillamessaging.com/en-US/thunderbird/
HydraIRC - IRC Program
http://www.hydrairc.com/index.php?page=downloads
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Anti Virus, Spyware, Malware and so on:
Ad-Aware Free
http://download.cnet.com/Ad-Aware-Free/3000-8022_4-10045910.html
Avast Anti-Virus Home Edition
http://www.avast.com/eng/download-avast-home.html
Must be Registered for free here:
http://www.avast.com/eng/home-registration.php
You have to pick ether the above Anti Virus program or the one below. I personally promote Avast, but they are both good.
AVG Anti-Virus Free Edition
http://download.cnet.com/AVG-Anti-Virus-Free-Edition/3000-2239_4-10320142.html?part=dl-10044820&subj=dl&tag=button&cdlPid=11014801
ClamWin - Non Real Time Antivirus. Can Scan and Remove. Can be used along side AVG or Avast.http://www.clamwin.com/content/view/18/46/
Spybot - Search & Destroy
http://www.safer-networking.org/en/mirrors/index.html
SpywareBlaster
http://www.javacoolsoftware.com/spywareblaster.html
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Media Player / Viewer:
Foxit Reader - Super light weight replacement for Adobe Acrobat Reader.
http://www.foxitsoftware.com/downloads/index.php
Sumatra PDF - Even More light weight replacement for Adobe Acrobat Reader.
http://blog.kowalczyk.info/software/sumatrapdf/download.html
Hulu Desktop - Small client for watching the many tv shows and movies at hulu.com
http://www.hulu.com/labs/hulu-desktop
IrfanView - Image Viewer
http://www.irfanview.com/main_download_engl.htm
Miro - All in one Video Player for offline and online videos, encluding flash sites and Video Podcasts
http://www.getmiro.com/download/
Smplayer - Small video player support all video formats,much like VLC
http://smplayer.sourceforge.net/downloads.php?tr_lang=en
Songbird - Nice Music Playing software. Good for small and mid-sized music collection. Not good for massive music collections.
http://www.getsongbird.com/
CoolPlayer+ Portable - Portable Clone of Winamp
http://portableapps.com/apps/music_video/coolplayerp_portable
VLC - The video swiss army knife. Plays any format, converts and streams over network and Internet. Simple interface and very light weight.
http://www.videolan.org/vlc/download-windows.html
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Media Editor:
Audacity - Audio recorder and editor.
http://audacity.sourceforge.net/
Avidemux - Simple video editor.
http://fixounet.free.fr/avidemux/download.html
Blender - 3D C.A.D. Grade A.
http://www.blender.org/download/get-blender/
CDEX - Audio CD Ripper
http://cdexos.sourceforge.net/?q=download
BonkEnc - Audio CD Ripper / Convert Audio Formats.
http://www.bonkenc.org/
Gimp - Image Editor
http://www.gimp.org/downloads/
HandBrake - DVD Ripper, DVD to file
http://handbrake.fr/downloads.php
Juice - premier podcast receiver.
http://juicereceiver.sourceforge.net/
Media Coder - Convert almost any Audio or Video format to any other format.
http://mediacoder.sourceforge.net/
Paint.net - Photo Shop Clone
http://www.paint.net/
Notepad++ - Like Normal Notepad.. only.. better.
http://sourceforge.net/projects/notepad-plus/files/
(look for. exe)
Open Office - Full office suite. Supports opening, editing and saving of Microsoft formats and can save to PDF.
http://www.openoffice.org/
PDFTK Builder - Split, collate, watermark and password protect PDF documents.
http://www.softpedia.com/get/Office-tools/PDF/PDFTK-Builder.shtml
Sunbird - Calendar Application.
http://www.mozilla.org/projects/calendar/sunbird/
Mp3splt Project - Split MP3's and Ogg with out having to re-encode.
http://mp3splt.sourceforge.net/mp3splt_page/home.php
MusicBrianz - automatically identify and clean up the metadata tags in your digital music collections.
http://musicbrainz.org/
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Other:
Portable KeePass - password manager.
http://portableapps.com/apps/utilities/keepass_portable
Microsoft .NET Framework 3.5 SP1 Standalone Full Redistributable Setup Installer For XP.
http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e-fdaa79a8ac3d/dotnetfx35.exe
PeaZip - Create and Open All types of Compressed folders.
http://peazip.sourceforge.net/
Stellaium - Planetarium.
http://www.stellarium.org/
TrueCrypt - Disk / File Encryption Software.
http://www.truecrypt.org/downloads
Eraser - Completely remove sensitive data from your hard drive.
http://eraser.heidi.ie/index.php#download
InfraRecorder - CD / DVD burning software.
http://infrarecorder.org/?page_id=5
CDBurnerXP - CD / DVD burning software.
http://cdburnerxp.se/en/download
RipIt4Me - Convert store bought dvd's to files that can be burned to blank dvd's.
http://www.majorgeeks.com/download5408.html
DVD Flick - Video files to DVD.
http://www.dvdflick.net/download.php
Dia - full-featured diagramming program.
http://projects.gnome.org/dia/
PNotes - On Screen sticky notes.
http://pnotes.sourceforge.net/index.php?page=5
SpeedCrunch - fast, high precision and powerful desktop calculator.
http://speedcrunch.org/en_US/download.html
JkDefrag - Disk defragmentation and optimization.
http://www.mydefrag.com/Manual-DownloadAndInstall.html
Lightscreen - Easy to use screenshot tool.
http://lightscreen.sourceforge.net/#download
Xenon File Manager Portable - Tabbed File manager.
http://portableapps.com/apps/utilities/xenon_portable
Python
http://www.python.org/download/
Real Alternative - Real Player Replacement.
http://home.hccnet.nl/h.edskes/finalbuilds.htm#realalt
QuickTime Alternative - Quicktime Replacement.
http://home.hccnet.nl/h.edskes/finalbuilds.htm#quicktimealt
ffdshow - pretty much every video codec for windows.
http://www.free-codecs.com/download/FFDshow.htm