The Eight Brocades, also called Ba Duan Jin Qigong, is one of the officially recognized qigong health forms. The Eight brocades has also become a template for many modified styles, such as Shaolin style, Yang style, & Wudang style. This video is one of the more easy-to-follow demonstrations of the Eight Brocades Qigong exercise.
Different chakra energies provide different types of experiences. You can train yourself to cultivate and use these subtle energies for more diverse purposes.
QiCultivation.com - Information on using the tools and methods to better sense subtle, spiritual energies, as well as receive and interpret the messages, and use/direct those energies.
AnotherQ.com - Personal experiences with subtle, spiritual energy.
QigongByQuist.com - Using Qi and subtle energies to help you maintain your health and wellness.
QibyQ - Directing subtle energies to help the earth and humanity