Here is a post I made regarding independent SaaS startups. If you are looking to start your own, give it a look:

https://new.blicio.us/tips-to-succeed-as-a-saas-startup/

Software as a Service (SaaS) is one of the hottest business models of internet-based businesses, and if done right, it can be quite profitable with little overhead. More than half of the world’s organizations are reliant on SaaS services, and big companies like Microsoft are serving such applications.