|Stable release||29 December 2011|
|Operating system||Microsoft Windows|
winPenPack  (often shortened to wPP) is an open source software application suite for Windows. It is a collection of open source applications that have been modified to be executed directly from a USB flash drive (or any other removable storage device) without prior installation. WinPenPack programs are distributed as a free software, and can be downloaded individually or grouped into suites.
The creator, Danilo Leggieri made the site winPenPack.com officially online on 23 November 2005 for the first time. The project and the associated community then grew quickly. Since that date 15 new versions and hundreds of Open Source portable applications were released. Now the project is well known in Italy and abroad. It is hosted on SourceForge. The collections are regularly distributed in bundle with popular PC magazines in Italy and worldwide. A thriving community of users is growing up over the years and is actively contributing to the growth of the project. The site currently hosts various projects created and suggested by forum members, and is also used for bug reporting and suggestions.
All the applications available in the winPenPack suites are classified as Portable Applications. Portable Applications:
- do not require installation
- can be executed from any USB flash drive, and from any PC hard disk drive (internal or external)
- leaves no traces of its use in the Windows applications registry or any other user folder in the host PC hard drive
- does not conflict with the programs installed in the host PC hard drive (for example, X-Firefox executed from a USB flash drive does not modify (or conflict with) the counterpart Firefox program installed on the host PC)
X-Software are software that have been modified with X-Launcher to be executed as if they were Portable Applications. X-Launcher is a specific application which executes other applications in "portable mode" by means of recreating their original operating environment. A few examples of X-Software include X-Firefox (counterpart to Mozilla Firefox), X-Thunderbird (Mozilla Thunderbird), X-Gimp (The Gimp), and others.
The winPenPack main menu can be executed from any removable storage device (including, and especially, from USB flash drives). In each different winPenPack suite, the main menu is pre-configured to list all programs available (including programs belonging to other suites), and can be edited at any time. New programs can be added to the menu either manually (by means of the "Add" options or by drag-and-dropping them onto the menu) or automatically (please note that automatic installation is only available for X-Software, as opposed to portable applications).
Since 2006 may, Winpenpack has been covered by most major Italian PC publications  including: PC Professionale, Win Magazine, Computer Magazine, Total computer, Internet Genius, Quale computer, Computer Week, and many others