Pear Linux is an stable, fast and powerful open source operating system based on Ubuntu Desktop distribution. The latest release was Pear Linux 6.1 code named (Bartlett) was created by David Tavares. The outcome of Pear Linux is to create an Ubuntu based Linux operating system with much simple, but powerful desktop interface. It provides an impressive Pear Appstore repository that gives you a thousands of apps to select and install by one click of mouse with powerful multi-threaded download manager.
http://www.tecmint.com/pear-linux-6-installation-guide/