Islamic concepts

Ṣalāt al-Sunnah — optional or bonus prayer

  • Ṣalāt al-Tahajjud: optional night prayer (sleep a little before getting up for it)
  • Eclipse prayer
  • Tarawīḥ تراويح‎ — bonus prayers during Ramaḍān
  • Ṣalāt al-ʿĪd
  • Ṣalāt al-Istikhārah صلاة الاستخارة ‎ Prayer for guidance

http://en.wikipedia.org/wiki/Sunnah_salat