Best free bare metal virtualization software

Bare metal virtualization software runs directly on the host's hardware as a hardware control and guest operating system monitor. You don't need an OS to run on the host hardware. This software is great for running multiple OS environments on a single physical host. You can consolidate your data center by cutting down on the number of physical machines and conserve energy. Get with the green program folks!

I looked at 3 of the free bare metal hypervisors in the market:

• VMWare ESXi
• Citrix Xenserver
• Oracle VM

VMWare ESXi does not give you centralized management abilities for free. You need to purchase additional tools from VMWare to get this ability. Citrix and Oracle provide centralized management and many other features that are not available with VMWare for free. Oracle is still not very popular in the baremetal hypervisor market and needs to gain a lot of ground.

I personally found Citrix Xenserver to be the best among the available baremetal hypervisors for the following reasons:

1. A wide array of features required to run your servers available free of cost.
2. Max support of 8 virtual CPUs vs. only 4 for ESXi
   
3. Better hardware support for SATA harddrives out of the box [ESXi only supports SAS/SCSI - you need to hack it to make it work with SATA].

It remains to be seen how long VMWare will sit back and let Citrix gain some ground before leveling the playing field by introducing free features in their product.

There are some hardware requirements for these hypervisors. You need to have 64 bit CPUs that support either the Intel-VT or AMD-V hardware virtualization technology. There is also a very limited subset of hardware that these hypervisors are certified with. Make sure to check these requirements before making the jump into bare metal virtualization. The alternative is to go with a hosted hypervisor [a.k.a Type 2 hypervisor] such as Sun's Virtualbox, VMWare Server, or Microsoft VirtualServer.

VirtualBox - Best free desktop virtualization

VirtualBox is a very good desktop virtualization software from Sun Microsystems that is available for free. VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems.

Truecrypt - Free on-the-fly file and disk encryption software - UPDATE: Truecrypt is no longer recommended - Migrate to Veracrypt

Truecrypt is for the paranoid user who needs to have his/her files or partitions encrypted on the fly [no user intervention], once you have configured the software. It is an open source software available for free. Check out all the features here. The software runs on Windows, Mac, and Linux.

Truecrypt is no longer supported. Users are advised to migrate to https://www.veracrypt.fr/

OpenOffice - An excellent free alternative to Microsoft Office

Openoffice is available for free for use an alternative to Microsoft Office. Download it from http://download.openoffice.org/index.html. Many institutions across the world are using this software. The software can install and run on Windows, Mac, and Linux. If you need to send any of the documents produced from Openoffice to anyone who needs it in a Microsoft format, you can do so. You can even open Microsoft formats with Openoffice [You will need to wait for OpenOffice 3 for Microsoft Office 2007 documents] . The upcoming OpenOffice 3.0 release has many features that would it make it a serious contender to Office 2007.

Peazip - Free file and archive manager utility

PeaZip is a free, open source file and archive manager.

It allows you to open archives of the following types:

• ACE, ARJ, CAB, CHM, COMPOUND (MSI, DOC, XLS, PPT), CPIO, ISO, Java (JAR, EAR, WAR), Linux (DEB, PET/PUP, RPM, SLP), LHA/LZH, LZMA, Mac (DMG/HFS), NSIS, Open Office files, PAK/PK3/PK4, RAR, SMZIP, U3P, UDF, WIM, XAR, XPI, Z/TZ.
  

It allows you to create archives of the following types:

• 7Z, ARC, BZ2, GZ, PAQ/LPAQ, PEA, QUAD/BALZ, TAR, UPX, ZIP

PeaZip allows to save archive's layouts; apply powerful multiple search filters to archive's content; handle multiple archives at once; export job definition as command line; bookmark archives and folders etc.
Other features: AES256 encryption, robust file copy, split/join files (file span), secure file deletion, compare, checksum and hash files, system benchmark, generate random passwords and keyfiles.

PeaZip is cross platform, available as portable and installable software for 32 and 64 bit Windows (9x, 2000, XP, Vista) and Linux.

Miro - Free Media Player and so much more

Miro is a media player that can play any format [MPEG, Quicktime, AVI, H.264, Divx, Windows Media, Flash Video, and more]. It is just not a mediaplayer. Check out the features at http://www.getmiro.com/features/. It works on Windows, MAC, and Linux. Best of all, it's free.

Search for songs and listen to them using Songza

Songza is a website that allows you to search for any song and play it from within the webpage using an AJAX based interface. You don't need to use any external application to listen to the songs.

Free Disk Partitioning Utility - GParted

I was looking for an open source alternative to Norton's Partition Magic. I created 2 partitions on my laptop's 40 GB hard drive and my 20 GB C: partition was running out of space. I wanted to extend it's size. Windows Disk Management utility does not give you the ability to do this. I wanted a reliable tool that would let you do this. I used Partition Magic in the past. I wanted to explore open source options before buying something to do this and found a few. The best among them, IMHO, is GParted.
Here is the description of GParted from the website -> GParted is an industrial-strength package for creating, destroying, resizing, moving, checking and copying partitions, and the filesystems on them. This is useful for creating space for new operating systems, reorganizing disk usage, copying data residing on hard disks and mirroring one partition with another (disk imaging).
In order to use GParted on a windows PC, you need to create a Live CD [a bootable Linux CD]. The disk image for the GParted Live CD is available here. You need to download the .iso image to a CD and this creates the bootable disk. Documentation on how to use GParted Live CD is available here.

Lightweight Operating System - Damn Small Linux [DSL]

Damn Small Linux aka DSL, is a lightweight Linux OS that can run off a flash drive or CD. The size of the OS is about 50 MB. You might think - "Hmm, this must one of those command line shell interfaces". Don't be fooled by it's size. It has a GUI desktop and several applications such as XMMS, FTP client (both graphical and command line) and server, Mozilla Firefox web browser, Dillo web browser, Links-hacked web browser, Siag Office's Siag spreadsheet, FLWriter, Sylpheed email, spellcheck (US English), some editors (Beaver, Vim, Nano), graphics editing and viewing (Xpaint, and xzgv), Xpdf, emelFM (file manager), Naim (AIM, ICQ, IRC), VNCviewer, Rdesktop, SSH/SCP server and client, DHCP client, PPP, PPPoE (ADSL), Monkey web server, calculator, generic and GhostScript printer support, Network File System, games, system monitoring apps, a host of command line tools, USB support, and PCMCIA support.
Whoa!! All that in just 50 megs is amazing. Wait, it gets better. You can download more software for free using DSLPanel, a tool that is available on the DSL desktop.
Get DSL here -> http://www.damnsmalllinux.org/download.html

I can think of several scenarios where this can come in handy ->

1. if you want to use a public PC [internet cafe, library, etc.] and want to be protected from viruses and malware, use DSL. Instructions on creating a flash drive containing DSL.
   
2. PC crashes - DSL can come in handy to help you recover files from the hard disk.
3. Put old PCs to good use by installing DSL on them
   

Free firewall software - highly rated

Comodo is a free firewall software that was recommended by Computerworld . Download it here.
Comodo has other free products too such as an anti-virus,anti-spam, and anti-malware. I have not used these but I would highly recommend the firewall. It's way better than the standard windows firewall.

Free Microsoft online training on Microsoft Visual Studio

http://msdn.microsoft.com/vstudio/express/beginner/default.aspx

Free Antivirus software

1. AVG Antivirus -> http://free.grisoft.com/doc/1
2. Avast Antivirus -> http://www.avast.com/eng/avast_4_home.html
3. Clamwin Antivirus -> http://www.clamwin.com/ - Open Source
4. Avira Antivirus -> http://www.free-av.com/
   
Avira is rated pretty high in the latest anti-virus ratings at av-comparatives

Latest Anti-virus software ratings at Av-Comparatives.

Photo Tourism

A colleague of mine pointed me to this new paradigm in storing and viewing photographs. Check it out->
http://uwnews.washington.edu/ni/article.asp?articleID=30518
http://labs.live.com/photosynth/

Real estate resources - Buyers can get the upper hand in negotiations

1. Trulia: Want to find what's available for sale in a neighbourhood? Enter the zipcode or city and state and Trulia shows you all the homes for sale on a map. Point your cursor to one of the homes and it will you show you the price of the home. For any given search, Trulia will show statistics on average home prices per bedroom, average time a home is on the market, average price per square foot, etc. This translates into more power for the buyer.
2. PropertyShark: Want to find out what the seller paid for the home you are interested in? You don't need to waste your time going to the local county office for this information. PropertyShark let's you find this information and much more. When you register for a free account, you can look upto 15 properties per day. With the free subscription, you get information on how much the seller paid and when the property was purchased. It also tells you when and how much the neighbouring properties were purchased for. For more information you need to sign up for their paid subscriptions.