What mainly public refer to, as just "yoga" is basically "Hatha Yoga". Hatha Yoga is one of the most popular forms of yoga, and many other styles of yoga are originated from Hatha Yoga that includes Bikram Yoga, Asthanga Yoga, Power Yoga, and Kundalini Yoga. All styles of Hatha Yoga try to stabilize the strength of mind, fitness of body, and the spirit through the poses and Asanas; but the importance fluctuates. Some styles of Hatha Yoga highlight strictly on arrangement of the body while some concentrates on the synchronization of breath and movement. Best-known styles of Hatha Yoga are following:

Iyengar Yoga:
Was created by B.K.S.Iyengar younger brother in law of Rishi Kishnamacharya. This style of Yoga concentrates on body arrangement. The practice generally stress on holding poses for long time versus changing fastly from one pose to the other.
Kundalini Yoga:
was originated by Sikh guru Yogi Bhajan in 1969. It concentrates on the limited release of the serpent energy that is found at the base of our backbone. Kundalini Yoga includes Meditation, classic poses, chanting, and synchronization of breath and movement.
Bikram Yoga:
initiated by Bikram Choudhury.This Yoga style includes 26 postures and performed in a fixed series in a room heated at 100 to 110 degrees. This process allows loosening of stretched muscles and plentiful sweating, which is reflected as complete cleansing.
Anusara Yoga:
was created by John friend in 1997. Anusara unites a strong emphasis on physical arrangement with an optimistic philosophy copied from Tantra. The philosophy�s principle is faith in the basic goodness of all beings.
Kripalu Yoga:
initiated by Yogi Amrit Desai. Kripalu yoga is practiced with a concerned approach and highlight on meditation, physical curing and spiritual revolution that spread into every day life.
Integral yoga:
was originated by Swami Satchidananda, student of Rishi Sivananda of Rishikesh. Integral Yoga put equivalent importance to Pranayama (Breathing Control), Meditation, and Asanas (Physical Poses).
Sivananda Yoga:
created by Late Swami Vishnudevananda. This approach of Yoga focuses on the standard Asanas, Pranayama and Relaxation, It also focuses on Diet and constructive thoughts and Meditation.
Ananda Yoga:
developed by Swami Kriyananda. Ananda Yoga is a conventional style of Hatha Yoga, which uses Pranayama and Asana to wake up and experience, how to control the delicate energies within oneself, particularly the energies of the Chakras.