winPenPack is an applications environment of Free Softwares, modified for being run and used from an USB pendrive, without need of installation. The removable device, so, is no more a simple data container, but becomes a really self-contained environment, within programs and documents are homogeneously integrated."Portable" softwares included into winPenPack does not need to be installed, does not write their settings into host PC, and can be easily carried between multiple computers through any external device, as removable hard disks or USB pendrives.After inserting the USB pendrive into a free USB port of host PC, user will have immediately available a collection of pre-configured and ready to use programs, subdivided in categories and executable through a practical menu, analogue to Windows menu Start, the winPenPack Launcher. User will feel as is working on its own PC, with web browsers, e-mail clients, image and drawing editors, chat clients, PC maintenance and security, school, development. All he needs, always available. All these features make winPenPack extremely useful in any field.