Portable LibreOffice

LibreOffice Portable 3.3.2 Latest Release - Download

LibreOffice is a full-featured office suite, including a word processor, spreadsheet, presentation tool, drawing package and database.
Free office suite that's compatible with Microsoft Office, Word Perfect, Lotus and other office applications. It's easy-to-use and feature-rich, performing nearly all of the functions you'd expect in an office suite, but at no cost.

Download the portable version, so you can take all your documents and everything you need to work with them wherever you go.

Calcute: Freeware Portable Calculator

Calcute: Freeware Portable Calculator 11.4.28 - Download Latest Version

Calcute is the best calculator available at the moment. And yes, it's portable.

Portable info:
Use the setup program to extract the executable and help file to the directory you specify. You can copy the calcute.exe program file (and the calcute.chm help file if you wish) to a thumb drive. Then, un-install your desktop version if all you need is a portable calculator.
Or just simply extract with 7zip, winzip, winrar, etc. to any folder and use it as portable application.

Q-Dir Portable Freeware

Q-Dir Portable - download the latest version
 

The best file explorer. Free and portable.
Q-Dir makes your files and folder easy to manage.
Fast and easy access to your hard disks, network folders, USB-Stiks, floppy disks and other storage devices.Q-Dir is a good file manager with an amazing Quadro-View technique.
You don't have to renounce the usual, Drag and Drop, all Views, and other functions of your system.

Q-Dir does not have to be installed and can be executed easily from the desktop, and can be carried on a small usb-stick or other memory device.

Mozilla Thunderbird Portable Email Client

Mozilla Thunderbird Portable 3.1.10 - DOWNLOAD Latest Version


"Mozilla Thunderbird is the safe, fast email client that's easy to use. It has lots of great features including quick message search, customizable views, support for IMAP/POP, RSS support and more. Plus, the portable version leaves no personal information behind on the machine you run it on, so you can take your email and adress book with you wherever you go."

You can manage multiple email accounts.
Gmail POP3 and IMAP compatible email client.

Mozilla Firefox, Portable Edition V4.0.1

Mozilla Firefox, Portable Edition V4.0.1 - download