Ananda Yoga: Ananda Yoga classes focus on gentle postures designed to move the energy up to the brain and prepare the body for meditation. Classes also focus on proper body alignment and controlled breathing.
Anusara Yoga is a relatively new form of yoga (1997), which pairs strict principles of alignment with a playful spirit. Postures can be challenging, but the real message of Anusara is to open your heart and strive to connect with the divine in yourself and others.
Ashtanga (or Astanga) Yoga is the name given to the system of yoga taught by Sri K. Pattabhi Jois. This style of yoga is physically demanding as it involves synchronizing breathing with progressive and continuous series of postures-a process producing intense internal heat and a profuse, purifying sweat that detoxifies muscles and organs. The result is improved circulation, flexibility, stamina, a light and strong body, and a calm mind. Ashtanga is an athletic yoga practice and is not for beginners.
Bikram Yoga is the method of yoga that is a comprehensive workout that includes all the components of fitness: muscular strength, muscular endurance, cardiovascular flexibility and weight loss. The founder, Bikram Choudhury, was a gold medal Olympic weight lifter in 1963 and is a disciple of Bishnu Ghosh, brother of Paramahansa Yogananda, (Autobiography of a Yogi). One of the unusual but most beneficial aspects of Bikram’s yoga practice is the 95-105 degree temperature which promotes more flexibility, detoxification, and prevention of injuries. This is the only yoga style that specializes in using the heated environment.
Hatha is an easy-to-learn basic form of yoga that has become very popular in the United States. Hatha Yoga is the foundation of all Yoga styles. It incorporates Asanas (postures), Pranayama (regulated breathing), meditation (Dharana & Dhyana) and kundalini (Laya Yoga) into a complete system that can be used to achieve enlightenment or self-realization. It has become very popular in America as source of exercise and stress management. The ideal way to practice the Hatha Yoga poses (asanas) is to approach the practice session in a calm, meditative mood. Sit quietly for a few moments, then begin the series, slowly, with control and grace, being inwardly aware as the body performs the various poses selected for the practice session. Do not overdo the asanas or try to compete with others. Take it easy and enjoy.
Integral Yoga: Sri Swami Satchidananda described Integral Yoga as: “…a flexible combination of specific methods to develop every aspect of the individual: physical, intellectual, and spiritual. This traditional type of yoga combines postures, breathing exercises, selfless service, meditation, chanting, prayer, and self-inquiry.
ISHTA: The word ISHTA has a two-fold definition. In Sanskrit, it means developing a personal yoga practice that meets your individual needs. ISHTA also stands for the Integrated Science of Hatha (the physical practice of yoga that creates balance), Tantra (the yogic philosophy that recognizes the perfection in all beings), and Ayurveda (the Indian science of healing). Developed by South African teacher Mani Finger and popularized in the States by his son Alan, ISHTA (Integral Science of Hatha and Tantric Arts) focuses on opening energy channels throughout the body with postures, visualizations, and meditation.
Iyengar Yoga, developed by yoga master B.K.S. Iyengar more than 60 years ago, promotes strength, flexibility, endurance, and balance through coordinated breathing and poses that require precise body alignment. The poses are generally held longer than in other styles of yoga. In Iyengar, you slowly move into a pose, hold it for a minute or so, and then rest for a few breaths before stretching into another. Equipment like cushions, blankets, straps, and blocks to help the less flexible also distinguishes Iyengar from other types of yoga. Although Iyengar incorporates the traditional postures, or asanas, that make up the broader category of hatha yoga, the cushions and other props revolutionized yoga by enabling everyone — even the elderly, sick, and disabled — to practice. Because of its slow pace, attention to detail, and use of props, Iyengar yoga can be especially good if you’re recovering from an injury. Iyengar is still one of the most popular types of yoga taught today.
source : http://www.yogahealthtips.com/Different-Types-of-Yoga.html