How to add custom filter options in online shopping site?

I am working on a online shopping site for Laptops. Now I want to add some custom filter option in my site for example filter by brands, filter by processor, filter by operating system, filter by price, filter by hard disk capacity etc. Just like in famous online shopping site like “www.flipkart.com” and “www.snapdeal.com”. So, can anyone help me in adding custom filter options?