Nowadays, people like easy and convenience for everything include a software. A portable application allow user access to their favorite application at anywhere, anytime with a GB of pendrive (thumb drive).
Portableapps.com provide such application which you may access to your portable application with your pendrive even you at hotel, company, etc without any installation.
Portableapps.com come with many application such as Mozilla Firefox, Mozilla Thunderbird, OpenOffice, FileZilla, Notepad++, etc. All our daily use application can be use in 1 application.
For more information, please refer to http://portableapps.com/