Find alternative to any sites:Similar Sites

There are times when we are using sites like we may face situation where it says server overloaded , so look for an alternative site which can fulfil our needs . so how to do so without spending a single penny from our pocket .  we can find an alternative path to solution by using . is a related content engine, displaying a list of related sites for any site that a user submits also provide a free Google toolbar that can be downloaded