What are some alternatives?
When comparing Zero Install and Just Install, you can also consider the following products
Ninite - Ninite is the easiest way to install software.
Chocolatey - The sane way to manage software on Windows.
Patch My PC - Patch My PC Updater is a free, easy-to-use program that keeps over 300 apps up-to-date on your computer.
Ketarin - Ketarin is a small application which automatically updates and optionally installs setup packages...
scoop - Automated carpooling for the modern commuter
Sumo - Free tools to grow your email list.