At Salsa we develop large scale web applications using the Code Igniter framework.  Code Igniter is a really simple, lightweight, but incredibly powerful Open Source framework for the PHP language used to create fully featured web applications. 

We utilise this framework to help deliver projects quicker, more efficiently and cost effective, and with a greater degree of accuracy. Because of the flexible architecture, Code Igniter allows Salsa developers to develop quickly, delivering short iterations of functionality to clients, allowing regular updates and feedback at regular intervals.

We're usually building a few large projects at any given time, and would be happy to provide demonstrations if you have a project you'd like to discuss in detail.