Sumatra PDF

"Sumatra PDF is a slim, free, open-source PDF viewer for Windows. Portable out of the box.

Sumatra has a minimalistic design. Simplicity has a higher priority than a lot of features.

It's small and starts up very fast.

It's designed for portable use: only one file so you can run it from external USB drive. Doesn't write to registry."

ASSP

"Stop Spam with the Anti-Spam-SMTP-Proxy (ASSP)

Want to put an end to SPAM? Try the deadly poison of ASSP!

Congratulations! You have just found the absolute best SPAM fighting weapon that the world has ever known! When it comes to killing SPAM nothing is as deadly as an ASSP! Check out the ASSP project site at sourceforge.net! "

http://assp.sourceforge.net/

VirtualBox

"VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL). See "About VirtualBox" for an introduction.

Presently, VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, and OpenBSD.

VirtualBox is being actively developed with frequent releases and has an ever growing list of features, supported guest operating systems and platforms it runs on. VirtualBox is a community effort backed by a dedicated company: everyone is encouraged to contribute while Sun ensures the product always meets professional quality criteria."

KeePass Password Safe

KeePass is a free, open source, light-weight and easy-to-use password manager.

What is KeePass?
Today you need to remember many passwords. You need a password for the Windows network logon, your e-mail account, your homepage's FTP password, online passwords (like website member account), etc. etc. etc. The list is endless. Also, you should use different passwords for each account. Because if you use only one password everywhere and someone gets this password you have a problem... A serious problem. The thief would have access to your e-mail account, homepage, etc. Unimaginable.

KeePass is a free open source password manager, which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key file. So you only have to remember one single master password or select the key file to unlock the whole database. The databases are encrypted using the best and most secure encryption algorithms currently known (AES and Twofish). For more information, see the features page.

Used and recommended by my friend Tony.

Openfiler

Openfiler is an open-source "storage management operating system" that takes the Linux OS and makes it into a SAN controller. It can all be configured with a web browser. It can act as both SAN or NAS. It supports multiple iSCSI targets with multiple LUNs.

A Step-By-Step OpenFiler tutorial by David Davis: “Use OpenFiler as your Free VMware ESX SAN Server“ and how to configure for a static IP.

Another free option: StarWind. Their free version supports up to 2TB.

InfraRecorder

InfraRecorder is a free CD/DVD burning solution for Microsoft Windows. It offers a wide range of powerful features; all through an easy to use application interface and Windows Explorer integration.

TrueCrypt

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

Hard Drive Cloning Utility

http://clonezilla.org/

Open Source alternative to clone utilities such as Norton Ghost, Partition Image, etc.

Drive imaging program, bare metal backup and recovery.

WinDV

WinDV is a small and easy to use Windows application for capturing videos from DV device (camcorder) into AVI-files and for recording AVI-files into DV device via FireWire (IEEE 1394) interface. Capturing is very reliable thanks to use of large buffer queue. Timestamps recorded on DV tape by camcorder can be used to automatically split captured video into multiple files. During transmitting to DV, several AVI-files can be joined together to form final video recording.

Main features

• small & handy <100kb>
• input / output - capturing from DV device to AVI files (both type-1 and type-2 supported) and recording vice versa
• no dropped frames - memory buffering
• automatic AVI splitting according to the timestamps on DV recordings - every video sequence can be saved into unique file
• easy AVI joining - record multiple files joined to the DV device just using wildcards
• preview of transmitted video in the window
• free - you can download it and use it as you like at no cost

OpenWengo

"OpenWengo is a community of enthusiasts and developers, creating free software products related to communication over IP. The flagship product of the OpenWengo project is a softphone which allows you to make free PC to PC video and voice calls, and to integrate all your IM contacts in one place."

WengoPhone is a communication tool based on the SIP protocol. "It is more than just VoIP software: it is a full-fledged communications tool that lets you enjoy free calls, video conferencing, SMS, chat over many existing protocols (MSN, AIM/ICQ, Yahoo!, Jabber)"

Screenshots

BackupPC

"BackupPC is a high-performance, enterprise-grade system for backing up Linux and WinXX PCs and laptops to a server's disk. BackupPC is highly configurable and easy to install and maintain.

Given the ever decreasing cost of disks and raid systems, it is now practical and cost effective to backup a large number of machines onto a server's local disk or network storage. This is what BackupPC does. For some sites, this might be the complete backup solution. For other sites, additional permanent archives could be created by periodically backing up the server to tape. A variety of Open Source systems are available for doing backup to tape.

BackupPC is written in Perl and extracts backup data via SMB using Samba, tar over ssh/rsh/nfs, or rsync. It is robust, reliable, well documented and freely available as Open Source on SourceForge."

Portable Apps

http://portableapps.com/

"Convenient
Now you can carry your favorite computer programs along with all of your bookmarks, settings, email and more with you. Use them on any Windows computer. All without leaving any personal data behind.

Open
PortableApps.com provides a truly open platform that works with any hardware you like (USB flash drive, iPod, portable hard drive, etc). It's open source built around an open format that any hardware vendor or software developer can use.

Free
The Portable Apps Suite™ is free. It contains no spyware. There are no advertisements. It isn't a limited or trial version. There is no additional hardware or software to buy. You don't even have to give out your email address. It's 100% free to use, free to copy and free to share."

Winpooch

"Winpooch is a Windows watchdog, free and open source. Anti spyware and anti trojan, it gives a full protection against local or external attacks by scanning the activity of programs in real time. Associated with ClamWin antivirus, Winpooch keeps safe your computer against virus."

The Core Pocket Media Player (TCPMP)

Media playback on Windows (and other) PDAs - works with Shift voice mail WAV files.

The Core Pocket Media Player (TCPMP) is a software media player. Supported operating systems include Windows, Windows CE, Windows Mobile, Windows Smartphone, Palm OS and Symbian OS. http://en.wikipedia.org/wiki/The_Core_Pocket_Media_Player

http://tcpmp.en.softonic.com/pocket

http://www.hpcfactor.com/downloads/tcpmp/

Open Source Windows

http://www.opensourcewindows.org/

Free and open-source software is good for you and for the world. This is the best Windows software that we know of. No adware, no spyware, just good software.

A great list of great software.

DeltaCopy - Rsync for Windows

"In general terms, DeltaCopy is an open source, fast incremental backup program. Let's say you have to backup one file that is 500 MB every night. A normal file copy would copy the entire file even if a few bytes have changed. DeltaCopy, on the other hand, would only copy the part of file that has actually been modified. This reduces the data transfer to just a small fraction of 500 MB saving time and network bandwidth.

In technical terms, DeltaCopy is a "Windows Friendly" wrapper around the Rsync program, currently maintained by Wayne Davison. "rsync" is primarily designed for Unix/Linux/BSD systems. Although ports are available for Windows, they typically require downloading Cygwin libraries and manual configuration."

http://www.aboutmyip.com/AboutMyXApp/DeltaCopy.jsp

I initially found this program while reading an article on using FreeNAS to back up windows machines: http://www.dailycupoftech.com/windows-backup-with-rsync-and-freenas/

wxCommunicator

"wxCommunicator is a cross platform open source SIP softphone enabling users to make multiple calls, use several accounts, chat and create conferences. It is very configurable and should work with any VoIP provider. It is based on customized sipXtapi client library and wxWidgets 2.8.x GUI library and distributed under GNU GPL version 2 license."

OpenVPN

OpenVPN - An Open Source SSL VPN Solution by James Yonan

"OpenVPN is a full-featured SSL VPN solution which can accomodate a wide range of configurations, including remote access, site-to-site VPNs, WiFi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls"

Free WinUnRAR

"Free WinUnRAR is a little and easy to use utility. If you have it installed, you are able to decompress '.RAR' files in a fast and simple way (shell context menu - right click on file)."

Works great. A nice alternative to commercial products such as WinRAR when all you need to do is decompress the occasional RAR compressed file.

Inkscape

Inkscape is "An Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.

Inkscape supports many advanced SVG features (markers, clones, alpha blending, etc.) and great care is taken in designing a streamlined interface. It is very easy to edit nodes, perform complex path operations, trace bitmaps and much more."

"Aiming for capabilities similar to Illustrator, CorelDraw, Visio, etc."