Applications we use on daily basis are evolving and offer a lot more in terms of mobility. Lot of these applications are available in PAF (Portable Application Installer File)  format which can be installed on external storage devices.

I’ve put together a list of 11 must have apps on your USB, External Hard Drive or even an iPod player. Click here to read how to install portable app on any external storage device.

Check these wonderful apps out..

On-Screen Keyboard Portable

On-Screen Keyboard Portable is a handy way to bring your settings for the Windows’ built-in On-Screen Keyboard with you from PC to PC. It will remember your hover preferences and other options and provides an easy way to launch it right from the PortableApps.com Menu.

Working on machines you don’t know of, makes security that much more essential. This is why On-screen Keyboard becomes all the more important as keyloggers cannot track the keys being clicked on the on-screen keyboard.

Click here to download On-Screen Keyboard Portable

Mozilla Firefox, Portable Edition

Mozilla Firefox®, Portable Edition is the popular Mozilla Firefox web browser bundled with a PortableApps.com Launcher as a portable app, so you can take your bookmarks, extensions and saved passwords with you.

Click here to download Mozilla Firefox, Portable!

PuTTY Portable

PuTTY Portable is the popular PuTTY telnet and SSH client packaged as a portable app, so you can connect in to your systems on the go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Click here to download PuTTY Portable

7-Zip Portable

7-Zip Portable is the popular 7-Zip packaged as a portable app, so you can take your file archiver with you and work with your compressed 7z, ZIP, GZIP, BZIP2, TAR, RAR files and more on the go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Click here to download 7-Zip Portable

ClamWin Portable

ClamWin Portable is the popular ClamWin antivirus packaged as a portable app, so you can take your antivirus with you to scan files on the go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Click here to download ClamWin Portable

InfraRecorder Portable

InfraRecorder Portable is the popular InfraRecorder CD/DVD burning program packaged as a portable app, so you can do your disk burning on the go. It has all the same great features of InfraRecorder including the creation of custom data, audio and mixed-mode projects and recording them to physical discs as well as disc images.

Click here to Download InfraRecorder Portable

JkDefrag Portable

JkDefrag Portable is an easy to use disk defragmenter and optimizer packaged as a portable app so you can fix-up hard drives on the go. JkDefrag Portable includes a handy custom interface to give you more control while still keeping everything simple. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Click here to download JkDefrag Portable

KeePass Password Safe Portable

KeePass Portable is the popular KeePass Password Safe packaged as a portable app, so you can securely carry your email, internet and other passwords with you. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Click here to download KeePass Password Safe Portable

Lightscreen Portable

Lightscreen Portable is an easy to use screenshot app packaged as a portable app so you can take pictures of the current in-use desktop wherever you go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Click here to download Lightscreen Portable

Pidgin Portable

Pidgin Portable is the versatile Pidgin instant messaging client packaged as a portable app, so you can take your IM settings and buddy lists with you. It has all the same great features as Pidgin, including support for AOL, Yahoo, MSN, ICQ and Jabber networks, but there’s nothing to install on the local PC. You can also easily add portable encryption plugins for secure, encrypted messaging.

Click here to download Pidgin Portable

Toucan

Toucan is a custom built portable app for advanced users to synchronise, backup and encrypt their data, wherever they are.

Click here to download Toucan

Description of the apps are taken from the portableapps repo!
Image Credit: back2root