Zero Install is described as 'decentralised cross-distribution software installation system. Other features include full support for shared libraries, sharing between users, and integration with native platform package managers' and is an app in the OS & Utilities category. There are more than 25 alternatives to Zero Install for a variety of platforms, including Windows, Linux, Online / Web-based, Mac and BSD. The best alternative is PortableApps.com, which is both free and Open Source. Other great apps like Zero Install are Ninite (Freemium), Chocolatey (Freemium, Open Source), SUMo (Freemium) and Patch My PC (Free Personal).
PortableApps.com is a website offering many free, commonly used Windows applications that have been specially packaged for portability. These portable applications can be used from removable media such as USB flash drives.
Ninite is the easiest way to install software. Pick the apps you want, and the Ninite installer will download and install all of your selected apps at once, automatically. It is 100% hands-free; Ninite automatically rejects browser toolbars and other prepackaged junk.
Npackd (pronounced "unpacked") is an application store/package manager/marketplace for applications for Windows. It helps you to find and install software, keep your system up-to-date and uninstall it if no longer necessary.
Snaps are software packages that are simple to create and install. They auto-update and are safe to run. And because they bundle their dependencies, they work on all major Linux systems without modification.