Interesting project. no install required.

[eddie]

http://zero-install.sourceforge.net/

Zero Install
Dr Thomas Leonard

The Zero Install system aims to provide a better way of installing software than traditional systems (tarballs, apt-get, bundles, setup.exe, etc). Here are some of our goals:
Anyone can install software
You don't have to be the administrator (root) just to install a word-processor
Anyone can distribute software
You don't need to be blessed by a distribution (or anyone else) to be part of Zero Install;
The system is completely decentralised
It doesn't matter whether software is installed or not
You just run it. Zero Install handles the rest (downloading and caching as needed)

Security
If one user downloads a malicious program, other users aren't affected;
Users can share downloads without having to trust each other;
Installation does not execute any of the downloaded code;
Digital signatures are always checked before new software is run
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