The Portable App Directory™ and Portable App Marketplace™ list free open source software and freewareportable apps. As always, the PortableApps.com Platform, menu, backup utility, launchers, installer, format and other utilities are open source.
Internet
aMSN Portable - chat and video chat on MSN/Windows Live
DamnVid Portable - video downloader and encoder
DownThemAll! Extension (for Firefox) - download the files and images you want faster
FileZilla Portable - the full-featured FTP client
FireFTP Extension (for Firefox) - a lightweight extension
Google Chrome Portable (Freeware) - fast, simple, themeable browser
gPodder Portable - podcast receiver and manager
Iron Portable - advanced web browser
Juice Portable - podcast receiver and manager
Maxthon Portable (Freeware) - fast, powerful browser
Miranda IM Portable - chat with AOL, MSN and Yahoo users in a customizable interface
Mozilla Firefox, Portable Edition - the award-winning web browser that's safe and secure
Mozilla Thunderbird, Portable Edition - the handy email client
Opera, Portable Edition (Freeware) - lightweight, customizable browser
PChat Portable - full-featured IRC chat client
PopMan Portable - lightweight email notifier
PuTTY Portable - lightweight telnet and SSH client
qBittorrent Portable - lightweight bittorrent client
QuteCom Portable - softphone, text, audio and video chat
SeaMonkey, Portable Edition - complete internet suite (browser, email, chat, newsgroups)
Skype Portable (Freeware) - instant messaging, video chat and phone calls
µTorrent Portable (Freeware) - lightweight bittorrent client
wxDownload Fast Portable - multi-threaded download manager