Ubuntu 11.04 Application Center will provide an opportunity to "test-drive" applications without installing them directly.

Under the cut a few details

In the new version of this application installer, a “test drive” button will appear under the screenshot of the programs. The programs themselves run on Ubuntu servers, so naturally you need a good internet connection. At the moment, not all applications support this feature, but I think over time their number will grow



To be able to "test drive" you need to put the package qtnx

sudo apt-get install qtnx