Is there a database of emotional stimuli available? For my research I need to use emotional stimuli to use for habituation to certain emotion.

Are there any databases available (preferably free or not expensive) of non-linguistic stimuli I could use? (example: music, pictures, videos)
Yes! The International Affective Picture System (IAPS) is widely used.

From the IAPS instruction manual:


  The International Affective Picture System (IAPS) is being developed
  to provide a set of normative emotional stimuli for experimental
  investigations of emotion and attention. The goal is to develop a
  large set of  standardized, emotionally-evocative, internationally
  accessible, color photographs that includes contents across  a wide
  range of semantic categories. The IAPS (pronounced EYE-APS), along
  with the International Affective Digitized Sound system (IADS), the
  Affective Lexicon of English Words (ANEW), as well as other
  collections of  affective stimuli, are being developed and distributed
  by the NIMH Center for Emotion and Attention (CSEA) at  the University
  of Florida in order to provide standardized materials that are
  available to researchers in the study  of emotion and attention


The stimuli are completely free, but a request must be made by a faculty member (rather than a student). The reason they give for this is that "Making these materials familiar to the general public can seriously compromise their value as stimuli in many research projects."

You can request the stimuli here.


  Lang, P.J., Bradley, M.M., &amp; Cuthbert, B.N. (2008). International
  affective picture system (IAPS): Affective ratings of pictures and
  instruction manual. Technical Report A-8. University of Florida,
  Gainesville, FL.