Firefox Portable - Portable version of Mozilla FireFox web browser, part of the PortableApps Suite
Thunderbird Portable - Portable version of Mozilla Thunderbird email client, part of the PortableApps Suite
FileZilla Portable - Portable version of the Filezilla FTP client

Serv-U FTP Server Portable - Portable
Thanks to the folks at Serv-U for allowing the repackaging, Serv-U is now completely portable.