Appnr is a web-based package browser that install applications on
Ubuntu. This is a web interface for APT system, and the package is
downloaded and installed from Ubuntu/Third-party repositories.
The AptURL protocol handler and a web browser support are required to
install packages from Appnr. AptURL is a program that handles special
URLs to installing package on APT-based Linux systems. Firefox on Ubuntu
7.10 or higher has AptURL installed by default.