From Hindupedia, the Hindu Encyclopedia

Riddhi or Siddhi, also called 'Riddhi-Siddhi', refers to a supernatural power that can be harnessed and controlled by a person. This is theorized by various sects, usually Shaivism, Shaktism, [Tantric] Buddhism (Vajrayana), and Jainism.

According to Shaiva and Shakti yogins, many of yogis attained this energies.

According to the Jain Tiloyapannatti and Adipurana, there are 7 kinds:

  1. Buddhi (intellect)
  2. Vikriya (power to change form)
  3. Tapa (austerity)
  4. Bala (Might)
  5. Ausadha (healing power)
  6. Rasa (power to transform simple food into delicious dishes)
  7. Aksina (power to make limited food inexhaustible)