Use XP, Office and Ubuntu (6.06 and 8.04) without installing anything.

Wanna try XP, Office and Ubuntu (6.06 & 8.04), just to see the OS or try installing some app and test, or whatever your purpose may be?
We know using virtualization solution like VirtualBox can help here but there exist simpler solution which doesn't require any installation at all !!
Just head over to JPC-2, and choose your OS simple. It runs entirely in the browser and doesn't require you to install anything.
Quite neat, and nifty indeed. A must try webapp for all in need and enthusiasts!

Although it's sufficient statement for one to try out but if someone is interested in reading in details or hands on, head over to My Blog.

i Vmware Workstation ....

Also i was booting with UNetbootin for linux BT4 for my use ...

I made a persistent USB drive for it ....

For virtualization Virtualbox is always better than anything. Creating USB boot is fine but not handy always, say for example it's blocked in my company. This is one solution to fit some loose ends where all other trusted methods won't go (like normal install, virtualization, USB key, live disc, etc.)

Yea it is certainly the best substitute of Virtual box.
And we can use it in case of blockage of virtual box without any issues.

yeah truely agreed, virtual box is the best solution...and you may add one more site [You must be registered and logged in to see this link.] they too provide online operating system,