Hindu Gods Chart
There are four main sects within Hinduism: 1. Shaivism (in which Shiva is worshipped as the main god); 2. Vaishnavism (in which Vishnu worshipped as the main god); 3. Shaktism (in which the female aspects of god are primarily worshipped); and 4. Smartism (in which six main gods are worshipped: Shiva, Vishnu, Shakti, Ganesh, Murugan and Surya).
For more information, here are two excellent resources: