Portable software for cloud, local, and portable USB drives
PortableApps.com is the world's most popular portable software solution allowing you to take your favorite Windows software with you. It works on any cloud drive folder (Dropbox, Google Drive, OneDrive, etc), on any portable storage device (USB flash drive, memory card, portable hard drive, etc), or from your local hard drive. With millions of users all over the world and a full collection of open source software (as well as freeware and commercial software), PortableApps is the most complete solution for life on the go. PortableApps.com was founded by John T. Haller, whose Portable Firefox started the portable software trend. We've been making software portable since March 2004. Today, our team stands at nearly 100 developers, translators, application packagers, designers, and release testers. Our goal is to centralize the knowledge and development of portable software efforts and build a single, open platform that any software or hardware developer can use.
Free and Open Source Browser based Security Framework
OWASP Mantra - Free and Open Source Browser based Security Framework, is a collection of free and open source tools integrated into a web browser, which can become handy for penetration testers, web application developers, security professionals etc.
Browser for Tor based on Dooble & Vidalia as integrated Addon
Tor now plugs into the Browser. Dooble Web Browser, a secure open source userfriendly tool to explore the web secure over Tor. Steer Tor in the Browser (in Settings/Proxy/Tor) with an Add-On based on Vidalia. Just start the Add-On "Tor" in the Browser Add-On-Menu and in Settings/Proxy.