PortableApps.com

PortableApps.com is a website that distributes free applications for Windows that have been packaged for portability. These portable applications are intended to be used from removable storage devices such as USB flash drives.

The site was founded by John T. Haller and includes contributions from over 100 people, including developers, designers, and translators.

History
PortableApps.com started out as a Haller's personal website hosting a portable version of Mozilla Firefox in March 2004. He then expanded the project to include Mozilla Thunderbird and OpenOffice.org. The open-source group of portable programs outgrew his personal website and he moved it to a community site, PortableApps.com. The site currently hosts various projects created by forum members, and is also used for bug reporting and suggestions. Some PortableApps distributions are hosted on SourceForge.

Format
Application installers designed for use with the PortableApps.com menu follow the convention of using filenames ending in a paf .exe extension, include HTML documentation, and store data in the Data directory. Installers intended for use with the PortableApps.com menu can be either NSIS installers that are generated with the PortableApps.com Installer, compressed archives with self extractors, or a custom Windows executable.

The majority of applications can run on most computers with or later. Many apps will also run under Wine on Unix-like operating systems. Older versions of many apps support Windows 95/98/Me, but no new releases support these systems.

PortableApps.com Launcher
The PortableApps.com Launcher (also known as PAL) is used to make applications portable by handling path redirection, environment variable changes, file and directory movement, configuration file path updates. and similar changes, as configured. The PortableApps.com Launcher allows software to be made portable without any modification. All modern apps use PAL and the installers are made using the Nullsoft Scriptable Install System.