What are the Spiritual Gifts? People often talk about spiritual gifts, like tongues and prophecy. What spiritual gifts are mentioned in the Bible? Please provide references.
Wikipedia has a decent article on this subject. There are a few places in the Bible where lists of spiritual gifts occur, which are, according to Wikipedia, as follows:

Romans 12:6-8:


Prophecy
Serving
Teaching
Exhortation
Giving
Leadership
Mercy


1 Corinthians 12:8-10:


Word of wisdom
Word of knowledge
Faith
Gifts of healings
Miracles
Prophecy
Distinguishing between spirits
Tongues
Interpretation of tongues


1 Corinthians 12:28:


Apostle
Prophet
Teacher
Miracles
Kinds of healings
Helps
Administration
Tongues


Ephesians 4:11:


Apostle
Prophet
Evangelist
Pastor
Teacher


Note that Wikipedia lists those last two as one entry: Pastor-teacher - but they are more commonly listed as separate items.

1 Peter 4:11:


Whoever speaks
Whoever renders service


It could be argued that not all of these are spiritual gifts - some might be better referred to as roles or activities; also different versions of the Bible will use slightly different wording for some of these so it's important to look into the context and meaning of the relevant passages.

In addition, there are other places in the Bible where spiritual gifts are mentioned, but not necessarily as part of a list. A good example is this:


  Then the LORD said to Moses, “See, I have chosen Bezalel son of
  Uri, the son of Hur, of the tribe of Judah, and I have filled him
  with the Spirit of God, with wisdom, with understanding, with
  knowledge and with all kinds of skills— to make artistic designs for
  work in gold, silver and bronze, to cut and set stones, to work in
  wood, and to engage in all kinds of crafts.


--Exodus 31:1-5 (NIV)

And then there are other gifts, in such as abilities, talents and more (a good example being someone who is musically gifted); it's next to impossible to really give a definitive list because:


  Every good and perfect gift is from above, coming down from the Father of the heavenly lights, who does not change like shifting shadows.


-- James 1:17 (NIV)