I have been blabbering about portable apps since last year and the journey has been great. One effect that it had on me is I am now leaning on open source applications to help me 80% of the way in my web development work. It may not be a 100% because the research and development of paid software is really great.
PortableApps Suite is a collection of portable apps including a web browser, email client, office suite, calendar/scheduler, instant messaging client, antivirus, sudoku game, backup utility and integrated menu, all preconfigured to work portably. Just drop it on your portable device and you're ready to go.
Go Check it out! It just might change the way you work. It did, for me.